如何在 Python 中打印图案

2024 年 8 月 29 日 | 阅读 17 分钟

在 Python 中，for 循环用于打印各种图案。打印各种图案是在面试中最常见的编程问题。多个 for 循环用于打印图案，其中第一个外部循环用于打印行数，内部循环用于打印列数。大多数图案都使用以下概念。

外部循环用于打印行数。
内部循环用于打印列数。
用于根据 Python 中所需位置打印空格的变量。

在本教程中，我们将讨论一些常见的图案。

在 Python 中打印金字塔、星形和菱形图案

在本节中，我们将学习常见的金字塔图案。

图案 - 1：简单金字塔图案

示例 -

# Simple Python program to print the Simple pyramid pattern 
n = int(input("Enter the number of rows"))     
# Here, we are declaring the integer variable to store the input rows
# Here, we are declaring an outer loop to handle number of rows  
for i in range(0, n):  
    # Here, we are declaring an inner loop to handle number of columns  
    # Here, the values are changing according to outer loop  
        for j in range(0, i + 1):  
            # Here, we are declaring a for loop for printing stars  
            print("* ", end="")     
        # Here, we are giving the ending line after each row  
        print()  

输出

Enter the number of rows: 5
* 
* * 
* * * 
* * * * 
* * * * *

说明

在上面的代码中，我们初始化了 n 变量来输入图案的行数。我们输入 n = 5，外部 for 循环的范围是 0 到 4。

内部 for 循环的迭代取决于外部循环。内部循环负责打印列数。
在第一次迭代中，i 的值为 0，并且它增加了 1，所以它变成 0+1，现在内部循环迭代第一次并打印一个星号（*）。
在第二次迭代中，i 的值为 1，并且它增加了 1，所以它变成 1+1，现在内部循环迭代两次并打印两个星号（*）。
end 参数可以防止换行。它会一直打印星号直到循环有效。
最后的 print 语句负责在每行后结束该行。

图案 - 2：倒直角金字塔

示例 -

# Simple Python program to print the simple reversed right angle pyramid pattern  
rows = int(input("Enter the number of rows:")) 
# Here, we are declaring the integer variable to store the input rows 
k = 2 * rows - 2     # Here, the K is used for number of spaces  
# Here, we are declaring an outer loop to handle number of rows
for i in range(0, rows):  
      # Here, we are declaring an inner loop to handle number of spaces
    for j in range(0, k):  
        print(end=" ")  
    k = k - 2      # Here, we are decrementing the k value after each iteration  
# Here, we are declaring an for loop to handle number of rows    
for j in range(0, i + 1):  
        print("* ", end="")   # Here, we are printing the star pattern  
    print("")  

输出

Enter the number of rows: 5      
      * 
     * * 
    * * * 
   * * * * 
  * * * * *

图案 - 3：打印向下半金字塔

代码 -

# Simple Python program to print the simple downward half - pyramid pattern  
rows = int(input("Enter the number of rows:")) 
# Here, we are declaring the integer variable to store the input rows 
# Here, we are declaring the outer for loop for executing in reversed order  
for i in range(rows + 1, 0, -1):    
    for j in range(0, i - 1):     # here, we are declaring the for loop to print the pattern
        print("*", end=' ')  
    print(" ")  

输出

Enter the number of rows: 5
* * * * *  
* * * *  
* * *  
* *  
*

图案 - 4：打印三角形金字塔

代码 -

# Simple Python program to print the simple triangle pyramid
n = int(input("Enter the number of rows: "))  
# Here, we are declaring the integer variable to store the input rows
m = (2 * n) - 2     # Here, the m is used for number of spaces
# Here, we are declaring an outer loop to handle number of rows
for i in range(0, n):  
     # Here, we are declaring an for loop to handle number of spaces
    for j in range(0, m):  
        print(end=" ")  
    m = m - 1      # Here, we are decrementing the m after each loop  
# Here, we are declaring an outer loop to print the pattern    
for j in range(0, i + 1):  
        # Here, we are printing the full Triangle pyramid using stars  
        print("* ", end=' ')  
    print(" ")  

输出

Enter the number of rows: 10
                  *   
                 *  *   
                *  *  *   
               *  *  *  *   
              *  *  *  *  *   
             *  *  *  *  *  *   
            *  *  *  *  *  *  *   
           *  *  *  *  *  *  *  *   
          *  *  *  *  *  *  *  *  *   
         *  *  *  *  *  *  *  *  *  *

图案 - 5：向下三角形图案

代码 -

# Simple Python program to print the simple Downward Triangle Pattern
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
# Here, the k variable is used to print the space  
k = 2 * rows - 2  
# Here, we are declaring an outer for loop to handle number of rows 
for i in range(rows, -1, -1):  
    # Here, we are declaring an inner for loop to print the number of space.  
    for j in range(k, 0, -1):  
        print(end=" ")  
    k = k + 1  
    # Here, the inner for loop will be used to print the number of stars  
    for j in range(0, i + 1):  
        print("*", end=" ")  
    print("")  

输出

                  * * * * * * * * * * * 
                   * * * * * * * * * * 
                    * * * * * * * * * 
                     * * * * * * * * 
                      * * * * * * * 
                       * * * * * * 
                        * * * * * 
                         * * * * 
                          * * * 
                           * * 
                            *

图案 - 6：菱形图案

代码 -

# Simple Python program to print the simple Diamond shaped pattern
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
# Here, we are using the k variable to print the space  
k = 2 * rows - 2  
# Here, we are declaring an outer for loop to handle number of rows  
for i in range(0, rows):  
    # Here, we are declaring an inner for loop to print the number of spaces 
    for j in range(0, k):  
        print(end=" ")  
    # Here, we are decrementing the k value after each iteration  
    k = k - 1  
# Here, we are declaring an inner for loop to print the pattern  
    for j in range(0, i + 1):  
        print("* ", end="")  
    print("")  
# Here, we are writing the code for Downward triangle Pyramid  
# Here, we are using the k variable to print the space  
k = rows - 2  
# Here, we are declaring the for loop for downward triangle pyramid  
for i in range(rows, -1, -1):  
    # Here, we are declaring an inner for loop to print the pattern  
    for j in range(k, 0, -1):  
        print(end=" ")  
    # Here, we are Incrementing the k value after each iteration  
    k = k + 1  
    # Here, this inner loop will print number of stars  
    for j in range(0, i + 1):  
        print("* ", end="")  
    print("")  
# Here, this print is used for new line after each row to display pattern correctly

输出

Enter the number of rows: 8
              * 
             * * 
            * * * 
           * * * * 
          * * * * * 
         * * * * * * 
        * * * * * * * 
       * * * * * * * * 
      * * * * * * * * * 
       * * * * * * * * 
        * * * * * * * 
         * * * * * * 
          * * * * * 
           * * * * 
            * * * 
             * * 
              *

图案 - 7：在一个图案中打印两个金字塔

代码 -

# Simple Python program to print the simple two pyramid in a single pattern
# Here, we are declaring the integer variable to store the input rows
rows = input("Enter the number of rows: ")  
# Here, we are declaring an outer for loop to handle number of rows 
for i in range(0, rows):  
    # Here, we are declaring an inner for loop to print the stars 
    for j in range(0, i + 1):  
        print("*", end=' ')  
    # Here, we are changing the line after each iteration  
    print(" ")  
# Here, we are creating the code for the second pattern  
for i in range(rows + 1, 0, -1):  
    for j in range(0, i - 1):   
        print("*", end=' ')  
    print(" ") 
# Here, this print is used for new line after each row to display pattern correctly 

输出

Enter the number of rows: 7
*  
* *  
* * *  
* * * *  
* * * * *  
* * * * * *  
* * * * * * *  
* * * * * * *  
* * * * * *  
* * * * *  
* * * *  
* * *  
* *  
*

图案 - 8：沙漏形图案

代码 -

# Simple Python program to print the simple Hourglass pattern
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
k = rows - 2      # Here, we are using the k variable to print the space
# Here, we are declaring the for loop that is used to print the downward pyramid  
for i in range(rows, -1 , -1):  
    for j in range(k , 0 , -1):  
     # Here, we are declaring the for loop that is used to print the spaces
        print(end=" ")  
    k = k + 1      # Here, we are incrementing the K value after each iteration
# Here, we are declaring the for loop that is used to print the stars    
for j in range(0, i+1):  
        print("* " , end="")      # Here, we are printing the pattern using the stars
    print()    
k = 2 * rows  - 2
# Here, we are declaring the for loop that is used to print the upward pyramid  
for i in range(0 , rows+1):  
    for j in range(0 , k):  
        print(end="")  
    k = k - 1      # Here, we are decrementing the K value after each iteration
# Here, we are declaring the for loop that is used to print the stars    
for j in range(0, i + 1):  
        print("* ", end="")     # Here, we are printing the pattern using the stars
    print()  
# Here, this print is used for new line after each row to display pattern correctly

输出

Enter the number of rows: 5
   * * * * * * 
    * * * * * 
     * * * * 
      * * * 
       * * 
        * 
        * 
       * * 
      * * * 
     * * * * 
   * * * * * 
  * * * * * *

我们已经讨论了使用 for 循环的基本金字塔图案。图案的概念取决于逻辑和 for 循环的正确使用。

Python 中的数字图案

在本节中，我们将描述几种不同类型的数字图案程序。让我们一一理解以下图案。

图案 - 1：数字图案

代码 -

# Simple Python program to print the simple number pattern
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
# Here, we are declaring the for loop that is used to print the number of rows  
for i in range(rows+1):  
# Here, we are declaring the for loop that is used to print the value of i after each iteration  
    for j in range(i):  
        print(i, end=" ")       # Here, we are printing the number in some pattern  
    # Here, this print is used for new line after each row to display pattern correctly  
    print(" ")  

输出

Enter the number of rows: 5
1  
2 2  
3 3 3  
4 4 4 4  
5 5 5 5 5

解释 -

在上面的代码中，我们根据行数打印了数字。第一行打印单个数字。接下来，第二行打印两个数字，第三行打印三个数字，依此类推。在

图案 - 2：带有数字的半金字塔图案

代码 -

# Simple Python program to print the simple half pyramid pattern with the numbers
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
# Here, we are declaring the for loop that is used to print the number of rows  
for i in range(1, rows+1):  
    # Here, we are declaring the for loop that is used to print the number of columns   
    for j in range(1, i + 1):  
        print(j, end=' ')  
    print("")  
# Here, this print is used for new line after each row to display pattern correctly

输出

Enter the number of rows: 5
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5

在上面的代码中，我们在内部 for 循环中打印了列值 j。

图案 - 3：倒金字塔图案

代码 -

# Simple Python program to print the simple inverted pyramid pattern
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: 5"))  
k = 0  
# Here, we are declared the Reversed for loop to print downward inverted pattern  
for i in range(rows, 0, -1):  
    # Here, we are Incrementing the k after each iteration  
    k += 1  
# Here, we are declaring the for loop that is used to print the pattern
    for j in range(1, i + 1):  
        print(k, end=' ')  
    print() 
# Here, this print is used for new line after each row to display pattern correctly 

输出

Enter the number of rows: 5
1 1 1 1 1 
2 2 2 2 
3 3 3 
4 4 
5

说明

在上面的代码中，我们使用了反向循环来打印向下倒金字塔，其中数字在每次迭代后减少。

图案 - 4：相同的数字倒金字塔

代码 -

# Simple Python program to print the simple inverted pyramid pattern
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
# Here, all the rows value assign to n variable  
n = rows  
# Here, we are declaring the for loop that is used to print the inverted pattern  
for i in range(rows, 0, -1):
# Here, we are declaring the for loop that is used to print the pattern  
    for j in range(0, i):  
        # Here, this for loop is used to print the same number  
        print(n, end=' ')  
    print()  
# Here, this print is used for new line after each row to display pattern correctly

输出

Enter the number of rows: 6
6 6 6 6 6 6 
6 6 6 6 6 
6 6 6 6 
6 6 6 
6 6 
6

图案 - 5：数字降序排列

代码 -

# Simple Python program to print the simple descending order of numbers
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
# Here, we are declaring the Downward for loop for inverse loop  
for i in range(rows, 0, -1):  
    n = i      # Here, we are assign the value to n of i after each iteration  
    for j in range(0, i):  
        # Here, we are printing the reduced value in each new line  
        print(n, end=' ')  
    print("\r")  
# Here, this print is used for new line after each row to display pattern correctly

输出

Enter the number of rows: 6
6 6 6 6 6 6 
5 5 5 5 5 
4 4 4 4 
3 3 3 
2 2 
1

图案 - 6：打印 1 到 10 的数字图案

代码 -

# Simple Python program to print the simple numbers pattern from 1 t0 10
# Here, we are declaring the integer variable current number and storing the value 1
current_Number = 1  
stop = 2  
rows = 3  
# Here, we are declaring the row variable to store Number of rows to print numbers    
for i in range(rows):   # Here, we are declaring the for loop that is used for the rows 
    for j in range(1, stop):   
        print(current_Number, end=' ')# Here, we are printing the number under for loop
        current_Number += 1    # Here, we are incrementing the current number by 1
    print("")  
    stop += 2    # Here, we are incrementing the stop value by 2

输出

1 
2 3 4 
5 6 7 8 9

图案 - 7：从 10 到 1 的倒序图案

代码 -

# Simple Python program to print the simple reverse pattern from 1 to 10
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))
# Here, we are declaring the for loop for reverse order print 
for i in range(0, rows + 1):  
    # Here, we are declaring the for loop for decrement in i values  
    for j in range(rows - i, 0, -1):  
        print(j, end=' ')      # Here, we are printing the reverse pattern
    print()  

输出

Enter the number of rows: 6
6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1

图案 - 8：打印奇数

代码 -

# Simple Python program to print the odd number
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
i = 1     # here, we are declaring the variable with the value i
# Here, we are declaring the while loop to print number of rows  
while i <= rows:  
    j = 1  
    # Here, we are checking the column after each iteration  
    while j <= i:  
        # Here, we are printing the odd values  
        print((i * 2 - 1), end=" ")  
        j = j + 1      # here, we are incrementing the j value after each iteration
    i = i + 1    # here, we are incrementing the i value after each iteration
    print()  

输出

Enter the number of rows: 5
1 
3 3 
5 5 5 
7 7 7 7 
9 9 9 9 9

图案 - 9：使用数字的方块图案

代码 -

# Simple Python program to print the square pattern using numbers
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
for i in range(1, rows + 1):    # here, we are declaring the for loop
    for j in range(1, rows + 1):    # here, we are declaring the for loop
        # Here, we are checking the condition if value of j is smaller or equal than  
        # the j then print i otherwise print j  
        if j <= i:  
            print(i, end=' ')      # here, we are printing the I value when the condition is true
        else:  
            print(j, end=' ')  # here, we are printing the j value when the condition is false    print()  

输出

Enter the number of rows: 5
1 2 3 4 5 
2 2 3 4 5 
3 3 3 4 5 
4 4 4 4 5 
5 5 5 5 5

图案 - 10：列中的乘法数字

示例

# Simple Python program to print the multiplication number in the column
# Here, we are declaring the integer variable to store the input rows
rows = int(input("Enter the number of rows: "))  
for i in range(1, rows):     # here, we are declaring the for loop for the number of rows
    for j in range(1, i + 1):  
        # Here, we are printing the multiplication of the row and column  
        print(i * j, end='  ')  
    print()  

输出

Enter the number of rows: 8
1  
2  4  
3  6  9  
4  8  12  16  
5  10  15  20  25  
6  12  18  24  30  36  
7  14  21  28  35  42  49

在上一节中，我们讨论了所有基本的数字图案。这将使您对 Python for 循环有更强的掌握。我们可以使用 for 循环打印任何类型的图案。

Python 中的字母和字符图案

我们知道，每个字母都有其自己的 ASCII 值，因此定义一个字符并将其打印到屏幕上。让我们通过以下示例来理解这些图案

图案 - 1：带字符的直角图案

代码 -

print("The character pattern using the ascii value is: ")  
asciiValue = 65     # here, we are giving the ASCII value of A  
for i in range(0, 5):   # here, we are declaring the for loop for I values 
    for j in range(0, i + 1):    # here, we are declaring the for loop for j values
        # Here, the below will convert the ASCII value to the character  
        alphabate = chr(asciiValue)  
        print(alphabate, end=' ')     # Here, we are printing the alphabets
        asciiValue += 1 
# Here, we are incrementing the asciivalue by 1 after each iteration
    print()  

输出

The character pattern using the ascii value is: 
A 
B C 
D E F 
G H I J 
K L M N O

解释 -

在上面的代码中，我们将整数值 65 分配给 **asciiValue** 变量，这是 A 的 ASCII 值。我们定义了 for 循环来打印五行。在内部循环体中，我们使用 char() 函数将 ASCII 值转换为字符。它将打印字母，并在每次迭代后增加 asciiValue。

图案 - 2：带相同字符的直角图案

代码 -

print("The character pattern using the ascii value is: ")  
asciiValue = int(input("Enter the ASCII value to print pattern: "))  
# Here, we are taking the User - define value from the user  
if (asciiValue >= 65 or asciiValue <=122):    
# Here, we are declaring the if condition if it is true then it will enter the if block
    for i in range(0, 5):     # here, we are declaring the for loop in the range from 0 to 5
        for j in range(0, i + 1):  
# Here, we are declaring the for loop in the range from 0 to i+1
            # Here, the below will convert the ASCII value to the character  
            alphabate = chr(asciiValue)  
            print(alphabate, end=' ')    # Here, we are printing the alphabets
        print()  
else:    # here, the else block will be executed if the condition is false
    print("Enter the valid character value")  

输出

The character pattern using the ascii value is: 
Enter the ASCII value to print pattern: 75
K 
K K 
K K K 
K K K K 
K K K K K

图案 - 3：在图案中显示单词中的字母

代码 -

# Here, we are creating the simple python program to print letter of words in pattern
str1 = "JavaTpoint"   # here, we are declaring the string variable to store the string
x = ""  
for i in str1:     # here, we are declaring the for loop to iterate through str1
    x += i     # here, we are incrementing the x value with the I value after each iteration
    print(x)    # here, we are printing the x value after each iteration

输出

J
Ja
Jav
Java
JavaT
JavaTp
JavaTpo
JavaTpoi
JavaTpoin
JavaTpoint

我们可以使用任何单词来打印字符。

图案 - 5：带字符的等边三角形图案

代码 -

print("Print equilateral triangle Pyramid with characters ")  
s = 5  
asciiValue = 65  
m = (2 * s) - 2  
for i in range(0, s):  
    for j in range(0, m):  
        print(end=" ")  
    # Here, we are decreasing the value of after each iteration  
    m = m - 1  
    for j in range(0, i + 1):  
        alphabate = chr(asciiValue)  
        print(alphabate, end=' ')  
        # Here, we are increasing the ASCII number after each iteration  
        asciiValue += 1  
    print()  

输出

Print equilateral triangle Pyramid with characters 
        A 
       B C 
      D E F 
     G H I J 
    K L M N O

在本文中，我们讨论了所有基本的图案程序。这些图案通常在面试中被问到，也有助于理解 Python for 循环的概念。一旦我们掌握了程序的逻辑，我们就可以使用 Python 循环打印任何图案。

下一个主题如何在 Python 中从列表中删除元素

如何在 Python 中打印图案

在 Python 中打印金字塔、星形和菱形图案

图案 - 1：简单金字塔图案

图案 - 2：倒直角金字塔

图案 - 3：打印向下半金字塔

图案 - 4：打印三角形金字塔

图案 - 5：向下三角形图案

图案 - 6：菱形图案

图案 - 7：在一个图案中打印两个金字塔

图案 - 8：沙漏形图案

Python 中的数字图案

图案 - 1：数字图案

图案 - 2：带有数字的半金字塔图案

图案 - 3：倒金字塔图案

图案 - 4：相同的数字倒金字塔

图案 - 5：数字降序排列

图案 - 6：打印 1 到 10 的数字图案

图案 - 7：从 10 到 1 的倒序图案

图案 - 8：打印奇数

图案 - 9：使用数字的方块图案

图案 - 10：列中的乘法数字

Python 中的字母和字符图案

图案 - 1：带字符的直角图案

图案 - 2：带相同字符的直角图案

图案 - 3：在图案中显示单词中的字母

图案 - 5：带字符的等边三角形图案

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Python 问题

如何在 Python 中打印图案

在 Python 中打印金字塔、星形和菱形图案

图案 - 1：简单金字塔图案

图案 - 2：倒直角金字塔

图案 - 3：打印向下半金字塔

图案 - 4：打印三角形金字塔

图案 - 5：向下三角形图案

图案 - 6：菱形图案

图案 - 7：在一个图案中打印两个金字塔

图案 - 8：沙漏形图案

Python 中的数字图案

图案 - 1：数字图案

图案 - 2：带有数字的半金字塔图案

图案 - 3：倒金字塔图案

图案 - 4：相同的数字倒金字塔

图案 - 5：数字降序排列

图案 - 6：打印 1 到 10 的数字图案

图案 - 7：从 10 到 1 的倒序图案

图案 - 8：打印奇数

图案 - 9：使用数字的方块图案

图案 - 10：列中的乘法数字

Python 中的字母和字符图案

图案 - 1：带字符的直角图案

图案 - 2：带相同字符的直角图案

图案 - 3：在图案中显示单词中的字母

图案 - 5：带字符的等边三角形图案

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