python 1-100的数相加的和

1. 数字的相加

count = 1
sum = 0
while count <= 100:
　　sum = sum + count
　　count = count + 1 
print(sum)

结果:
5050

 

 

解释: count表示计数 , sum是一个变量, sum = sum+count 每次循环进行相加累计 ,

相当于 sum(变量) = 0 + 1  =>  sum = 1+2  => ...... => sum = 1+2+3+.....+100