Python 交换两个数字的程序

编写一个 Python 程序,使用临时变量、按位运算符和算术运算符交换两个数字。标准技术是使用临时变量。但是,Python 允许您使用逗号将值赋给多个变量,这是最佳的替代方法。

Python 使用临时变量交换两个数字的程序

此程序帮助用户输入两个数值。接下来,使用临时变量交换这两个值。

a = float(input(" Please Enter the First Value a: "))
b = float(input(" Please Enter the Second Value b: "))

print("Before Swapping two Number: a = {0} and b = {1}".format(a, b))

temp = a
a = b
b = temp

print("After Swapping two Number: a = {0} and b = {1}".format(a, b))
Program to Swap Two Numbers using temp variable

在上面的 Python 程序 示例中,我们分配了 a = 10 和 b = 20

Temp = a – 将 a 的值赋给 Temp 变量。
Temp = 10

a = b – 将 b 的值赋给变量 a
a = 20

b = Temp – 将 Temp 的值赋给变量 b
b = 10

使用函数交换两个数字

此交换数字的程序与上面相同,但这次我们将逻辑与 函数 分开。

# using functions
def swap_numbers(a, b):
    temp = a
    a = b
    b = temp
    
    print("After: num1 = {0} and num2 = {1}".format(a, b))
 
num1 = float(input(" Please Enter the First Value : "))
num2 = float(input(" Please Enter the Second Value : "))

print("Before: num1 = {0} and num2 = {1}".format(num1, num2))
swap_numbers(num1, num2)
Swap Two Numbers using Functions

Python 不使用临时变量交换两个数字的程序

此程序接受两个浮点数。接下来,我们执行多次赋值来交换它们。

a = float(input("Enter the First Value  = "))
b = float(input("Enter the Second Value = "))

a, b = b, a

print("a = {0} and b = {1}".format(a, b))
without using temporary variable
Enter the First Value  = 10
Enter the Second Value = 20
a = 20.0 and b = 10.0

使用算术运算符交换两个浮点数

在此 示例 中,我们不使用临时变量或第三个变量来交换两个数字,而是使用 算术运算符。这纯粹是两个变量的加法和减法。

# using arithmetic + and - operators
a = float(input(" Please Enter the First Value a: "))
b = float(input(" Please Enter the Second Value b: "))

print("Before Swapping two Number: a = {0} and b = {1}".format(a, b))

a = a + b
b = a - b
a = a - b

print("After Swapping two Number: a = {0} and b = {1}".format(a, b))
Swap Two Numbers using Arithmetic operators

用户输入的值为 a = 25 和 b = 45

a = a + b = 25 + 45 = 70

b = a – b = 70 – 45 = 25

a = a – b = 70 – 25 = 45

使用 XOR 按位运算符交换两个数字

在这里,我们使用 XOR 按位运算符 来交换两个数字。

a = int(input(" Please Enter the First Value : "))
b = int(input(" Please Enter the Second Value : "))

print("Before: a = {0} and b = {1}".format(a, b))

a = a^b
b = a^b
a = a^b

print("After: a = {0} and b = {1}".format(a, b))

使用按位运算符的输出

 Please Enter the First Value : 111
 Please Enter the Second Value : 222
Before: a = 111 and b = 222
After: a = 222 and b = 111