python 1-100的数相加的和

count = 1

sum = 0

while count <= 100:

　　sum = sum + count

　　count = count + 1

print(sum)

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

结果:

5050