python练习（2）

一、打印1到100

 i = 1
 while i < 101:
     print(i)
     i += 1

二、1-100和

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

三、1到100偶数和

 i = 0
 sum = 0
 while i < 100:
     i += 1
     if i % 2 == 0:
         sum = sum + i
 print(sum)

四、34-987之间的和

 i = 34
 sum = 0
 while i < 987:
     i += 1
     sum = sum