📜  如何在Python设置不同print模式

📅  最后修改于: 2020-10-29 01:00:06             🧑  作者: Mango

如何在Pythonprint图案

在Python,for循环用于print各种模式。印刷各种图案是面试中最常见的编程问题。多个for循环用于print模式,其中第一个外部循环用于print行数,而内部循环用于print列数。大多数模式都使用以下概念。

  • 外循环print行数。
  • 内部循环print列数。
  • 根据Python所需的位置print空白的变量。

在本教程中,我们将讨论一些常见的模式。

在Python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模式。

模式-1:简单的金字塔模式

范例-

# This is the example of print simple pyramid pattern
n = int(input("Enter the number of rows"))
# outer loop to handle number of rows
for i in range(0, n):
    # inner loop to handle number of columns
    # values is changing according to outer loop
        for j in range(0, i + 1):
            # printing stars
            print("* ", end="")     

        # ending line after each row
        print()

输出:

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

说明:

在上面的代码中,我们已初始化n变量以输入模式的行数。我们输入n = 5,外部for循环的范围将是0到4。

  • 内部for循环的迭代取决于外部循环。内部循环负责print列数。
  • 在第一次迭代中,i的值是0,并且它增加了1,所以它变为0 + 1,现在内部循环第一次迭代并print一个star(*)。
  • 在第二次迭代中,i的值是1,它增加了1,所以它变成1 + 1,现在内部循环迭代了两次,并print了两星(*)。
  • end参数可防止跳至另一行。它将打印星形,直到循环有效。
  • 最后一个print语句负责在每一行之后结束行。

模式-2:反向直角金字塔

范例-

# This is the example of print simple reversed right angle pyramid pattern
rows = int(input("Enter the number of rows:"))
k = 2 * rows - 2  # It is used for number of spaces
for i in range(0, rows):
    for j in range(0, k):
        print(end=" ")
    k = k - 2   # decrement k value after each iteration
    for j in range(0, i + 1):
        print("* ", end="")  # printing star
    print("")

输出:

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

模式-3:向下印刷一半-金字塔

代码-

rows = int(input("Enter the number of rows: "))

# the outer loop is executing in reversed order
for i in range(rows + 1, 0, -1):  
    for j in range(0, i - 1):
        print("*", end=' ')
    print(" ")

输出:

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

模式-4:印刷三角形金字塔

代码-

n = int(input("Enter the number of rows: "))
m = (2 * n) - 2
for i in range(0, n):
    for j in range(0, m):
        print(end=" ")
    m = m - 1  # decrementing m after each loop
    for j in range(0, i + 1):
        # printing full Triangle pyramid using stars
        print("* ", end=' ')
    print(" ")

输出:

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

模式-5:向下三角形模式

代码-

rows = int(input("Enter the number of rows: "))

# It is used to print space
k = 2 * rows - 2
# Outer loop in reverse order
for i in range(rows, -1, -1):
    # Inner loop will print the number of space.
    for j in range(k, 0, -1):
        print(end=" ")
    k = k + 1
    # This inner loop will print the number o stars
    for j in range(0, i + 1):
        print("*", end=" ")
    print("")

输出:

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

图案-6:菱形图案

代码-

rows = int(input("Enter the number of rows: "))

# It is used to print the space
k = 2 * rows - 2
# Outer loop to print number of rows
for i in range(0, rows):
    # Inner loop is used to print number of space
    for j in range(0, k):
        print(end=" ")
    # Decrement in k after each iteration
    k = k - 1
    # This inner loop is used to print stars
    for j in range(0, i + 1):
        print("* ", end="")
    print("")

# Downward triangle Pyramid
# It is used to print the space
k = rows - 2
# Output for downward triangle pyramid
for i in range(rows, -1, -1):
    # inner loop will print the spaces
    for j in range(k, 0, -1):
        print(end=" ")
    # Increment in k after each iteration
    k = k + 1
    # This inner loop will print number of stars
    for j in range(0, i + 1):
        print("* ", end="")
    print("")

输出:

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

图案-7:以单个图案打印两个金字塔

代码-

rows = input("Enter the number of rows: ")

# Outer loop will print the number of rows
for i in range(0, rows):
    # This inner loop will print the stars
    for j in range(0, i + 1):
        print("*", end=' ')
    # Change line after each iteration
    print(" ")
# For second pattern
for i in range(rows + 1, 0, -1):
    for j in range(0, i - 1):
        print("*", end=' ')
    print(" ")

输出:

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

模式-8:沙漏模式

代码-

rows = int(input("Enter the number of rows: "))
k = rows - 2
# This is used to print the downward pyramid
for i in range(rows, -1 , -1):
    for j in range(k , 0 , -1):
        print(end=" ")
    k = k + 1
    for j in range(0, i+1):
        print("* " , end="")
    print()

# This is used to print the upward pyramid
k = 2 * rows  - 2
for i in range(0 , rows+1):
    for j in range(0 , k):
        print(end="")
    k = k - 1
    for j in range(0, i + 1):
        print("* ", end="")
    print()

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。模式的概念取决于for循环的逻辑和正确用法。

Python的数字模式

在本节中,我们将介绍一些不同类型数字模式的程序。让我们一一理解以下模式。

模式-1:数字模式

代码-

rows = int(input("Enter the number of rows: "))
# Outer loop will print number of rows
for i in range(rows+1):
    # Inner loop will print the value of i after each iteration
    for j in range(i):
        print(i, end=" ")  # print number
    # 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  

说明-

在上面的代码中,我们根据行值打印了数字。第一行打印一个数字。接下来,在第二行中打印两个数字,在第三行中打印下三个数字,依此类推。在里面

模式-2:带数字的半金字塔模式

代码-

rows = int(input("Enter the number of rows: "))

# This will print the rows
for i in range(1, rows+1):
    # This will print number of column
    for j in range(1, i + 1):
        print(j, end=' ')
    print("")

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。

模式-3:倒金字塔形

代码-

rows = int(input("Enter the number of rows: 5"))
k = 0
# Reversed loop for downward inverted pattern
for i in range(rows, 0, -1):
    # Increment in k after each iteration
    k += 1
    for j in range(1, i + 1):
        print(k, end=' ')
    print()

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print向下倒置的金字塔,每次迭代后数量都会减少。

模式-4:相同编号的倒金字塔

代码-

rows = int(input("Enter the number of rows: "))
# rows value assign to n variable
n = rows
# Download reversed loop
for i in range(rows, 0, -1):
    for j in range(0, i):
        # this will print the same number
        print(n, end=' ')
    print()

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

模式-5:数字降序

代码-

rows = int(input("Enter the number of rows: "))
# Downward loop for inverse loop
for i in range(rows, 0, -1):
    n = i   # assign value to n of i after each iteration
    for j in range(0, i):
        # print reduced value in each new line
        print(n, end=' ')
    print("\r")

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

模式-6:在模式中打印1至10个数字

代码-

current_Number = 1
stop = 2
rows = 3  # Number of rows to print numbers

for i in range(rows):
    for j in range(1, stop):
        print(current_Number, end=' ')
        current_Number += 1
    print("")
    stop += 2

输出:

1 
2 3 4 
5 6 7 8 9

模式-7:反向模式从10变为1

代码-

rows = int(input("Enter the number of rows: "))
for i in range(0, rows + 1):
    # inner loop for decrement in i values
    for j in range(rows - i, 0, -1):
        print(j, end=' ')
    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

模式-8:打印奇数

代码-

rows = int(input("Enter the number of rows: "))
i = 1
# outer file loop to print number of rows
while i <= rows:
    j = 1
    # Check the column after each iteration
    while j <= i:
        # print odd values
        print((i * 2 - 1), end=" ")
        j = j + 1
    i = i + 1
    print()

输出:

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

模式-9:带数字的正方形模式

代码-

rows = int(input("Enter the number of rows: "))
for i in range(1, rows + 1):
    for j in range(1, rows + 1):
        # Check condition if value of j is smaller or equal than
        # the j then print i otherwise print j
        if j <= i:
            print(i, end=' ')
        else:
            print(j, end=' ')
    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

模式-10:列中的乘法数

rows = int(input("Enter the number of rows: "))
for i in range(1, rows):
    for j in range(1, i + 1):
        # It prints multiplication or 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数字模式。它将在Python进行强大的for循环命令。我们可以使用for循环的任何类型的模式。

Python的字母和字母模式

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print到屏幕上。让我们通过以下示例了解这些模式

模式-1:带有字符的直角模式

代码-

print("The character pattern ")
asciiValue = 65     #ASCII value of A
for i in range(0, 5):
    for j in range(0, i + 1):
        # It will convert the ASCII value to the character
        alphabate = chr(asciiValue)
        print(alphabate, end=' ')
        asciiValue += 1
    print()

输出:

The character pattern 
A 
B C 
D E F 
G H I J 
K L M N O

说明-

在上面的代码中,我们已将整数值65分配给asciiValue变量,该变量是ASCII值A。我们定义了for循环以print五行。在内部循环体内,我们使用char()函数将ASCII值转换为字符。它将print字母,并在每次迭代后增加asciiValue。

模式-2:具有相同字符的直角模式

代码-

print("The character pattern ")
asciiValue = int(input("Enter the ASCII value to print pattern: "))
# User - define value
if (asciiValue >= 65 or asciiValue <=122):
    for i in range(0, 5):
        for j in range(0, i + 1):
            # It will convert the ASCII value to the character
            alphabate = chr(asciiValue)
            print(alphabate, end=' ')
        print()
else:
    print("Enter the valid character value")

输出:

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

模式-3:在模式中显示单词的字母

代码-

str1 = "JavaTpoint"
x = ""
for i in str1:
    x += i
    print(x)

输出:

J
Ja
Jav
Java
JavaT
JavaTp
JavaTpo
JavaTpoi
JavaTpoin
JavaTpoint

我们可以使用任何单词来print字符。

模式-5:带字符的等边三角形模式

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=" ")
    # Decreased the value of after each iteration
    m = m - 1
    for j in range(0, i + 1):
        alphabate = chr(asciiValue)
        print(alphabate, end=' ')
        # Increase 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模式程序。这些模式在面试中经常被问到,并且有助于理解Python for loop的概念。一旦获得了程序的逻辑,就可以使用Python循环print任何模式。