Python示例：计算列表中元素的和

Python 示例

写一个 Python示例，用一个实际例子找到列表中元素的和。

Python示例查找列表中元素的和

这个 python 程序允许用户输入列表的长度。接下来，我们使用 Python For Loop 向列表中添加数字。

Python sum 函数返回列表中所有元素的 sum 。

# Python Program to find Sum of all Elements in a List

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)

total = sum(NumList)

print("\n The Sum of All Element in this List is : ", total)

不使用求和在列表中查找元素求和的程序

在这个程序中，我们使用 For Loop 来迭代这个列表中的每个元素。在循环中，我们将这些元素添加到总变量中。

NumList = []
total = 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):
    total = total + NumList[j]

print("\n The Sum of All Element in this List is : ", total)

Python 列表项的总和输出

Please enter the Total Number of List Elements : 5
Please enter the Value of 1 Element : 10
Please enter the Value of 2 Element : 20
Please enter the Value of 3 Element : 30
Please enter the Value of 4 Element : 40
Please enter the Value of 5 Element : 55

 The Sum of All Element in this List is :  155

使用 While 循环计算列表中元素总和的 Python示例

这个返回列表项总和的 Python示例与上面的相同。我们刚刚将 For 循环替换为 While 循环。

NumList = []
total = 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):
    total = total + NumList[j]
    j = j + 1
print("\n The Sum of All Element in this List is : ", total)

使用 while 循环输出的列表项的总和

Please enter the Total Number of List Elements : 6
Please enter the Value of 1 Element : 10
Please enter the Value of 2 Element : 20
Please enter the Value of 3 Element : -30
Please enter the Value of 4 Element : -40
Please enter the Value of 5 Element : 50
Please enter the Value of 6 Element : 100

 The Sum of All Element in this List is :  110

使用函数计算列表中所有元素总和的 Python示例

这个求列表项总和的程序和第一个例子一样。但是，我们使用函数分离了 python 程序逻辑。

def sum_of_list(NumList):
    total = 0
    for j in range(Number):
        total = total + NumList[j]
    return total

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)

total = sum_of_list(NumList)
print("\n The Sum of All Element in this List is : ", total)

使用函数输出的列表项的总和

Please enter the Total Number of List Elements : 7
Please enter the Value of 1 Element : 19
Please enter the Value of 2 Element : 11
Please enter the Value of 3 Element : 32
Please enter the Value of 4 Element : 86
Please enter the Value of 5 Element : 567
Please enter the Value of 6 Element : 32
Please enter the Value of 7 Element : 9

 The Sum of All Element in this List is :  756