Python程序查找列表中奇偶数的和

编写一个Python程序，使用For循环、While循环和函数以及实际示例查找列表中的奇偶数之和。

Python程序使用For循环查找列表中奇偶数的和

在此程序中，我们使用For循环迭代给定列表中的每个元素。在循环内部，我们使用If语句来检查和查找奇偶数的和。

NumList = []
Even_Sum = 0
Odd_Sum = 0

Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

for j in range(Number):
    if(NumList[j] % 2 == 0):
        Even_Sum = Even_Sum + NumList[j]
    else:
        Odd_Sum = Odd_Sum + NumList[j]

print("\nThe Sum of Even Numbers in this List =  ", Even_Sum)
print("The Sum of Odd Numbers in this List =  ", Odd_Sum)

在此python程序中，用于查找列表中奇偶数的和，用户输入的项目= [2, 3, 4, 5]，Even_Sum = 0，Odd_Sum = 0。

For循环 – 第一次迭代：for 0 in range(0, 4)
条件为True。因此，它进入If语句。

if(NumList[0] % 2 == 0) => if(2 % 2 == 0) – 条件为True
Even_Sum = Even_Sum + NumList[0] => 0 + 2 = 2

第二次迭代：for 1 in range(0, 4) – 条件为True
if(NumList[1] % 2 == 0) => if(3 % 2 == 0) – 条件为False，因此它进入Else块。
Odd_Sum = Odd_Sum + NumList[1] => 0 + 3 = 3

第三次迭代：for 2 in range(0, 4) – 条件为True
if(NumList[2] % 2 == 0) => if(4 % 2 == 0) – 条件为True
Even_Sum = 2 + 4 = 6

第四次迭代：for 3 in range(0, 4) – 条件为True
if(5 % 2 == 0) – 条件为False，因此它进入Else块。
Odd_Sum = 3 + 5 = 8

第五次迭代：for 4 in range(4) – 条件为False。因此，Python退出For循环

Python程序使用While循环查找列表中奇偶数的和

这个计算奇偶数和的程序与上面相同。我们只是用While循环替换了For循环。

NumList = []
Even_Sum = 0
Odd_Sum = 0
j = 0

Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

while(j < Number):
    if(NumList[j] % 2 == 0):
        Even_Sum = Even_Sum + NumList[j]
    else:
        Odd_Sum = Odd_Sum + NumList[j]
    j = j+ 1

print("\nThe Sum of Even Numbers in this List =  ", Even_Sum)
print("The Sum of Odd Numbers in this List =  ", Odd_Sum)

使用while循环输出列表中奇偶数之和

Please enter the Total Number of List Elements: 5
Please enter the Value of 1 Element : 22
Please enter the Value of 2 Element : 33
Please enter the Value of 3 Element : 44
Please enter the Value of 4 Element : 55
Please enter the Value of 5 Element : 99

The Sum of Even Numbers in this List =   66
The Sum of Odd Numbers in this List =   187

Python程序使用函数计算列表中奇偶数的和

这个奇偶数列表求和程序与第一个示例相同。但是，我们使用函数将逻辑分开了。

def even_sum(NumList):
    Even_Sum = 0
    for j in range(Number):
        if(NumList[j] % 2 == 0):
            Even_Sum = Even_Sum + NumList[j]
    return Even_Sum

def odd_sum(NumList):
    Odd_Sum = 0
    for j in range(Number):
        if(NumList[j] % 2 != 0):
            Odd_Sum = Odd_Sum + NumList[j]
    return Odd_Sum

NumList = []
Number = int(input("Please enter the Total Number of List Elements: "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

Even_Sum = even_sum(NumList)
Odd_Sum = odd_sum(NumList)
print("\nThe Sum of Even Numbers in this List =  ", Even_Sum)
print("The Sum of Odd Numbers in this List =  ", Odd_Sum)

使用函数输出列表中奇偶数之和

Please enter the Total Number of List Elements: 7
Please enter the Value of 1 Element : 12
Please enter the Value of 2 Element : 9
Please enter the Value of 3 Element : 21
Please enter the Value of 4 Element : 13
Please enter the Value of 5 Element : 87
Please enter the Value of 6 Element : 14
Please enter the Value of 7 Element : 66

The Sum of Even Numbers in this List =   92
The Sum of Odd Numbers in this List =   130