1、vim even.sh
#!/bin/bash
SUM=0
I=0
while [ $I -le 100 ];do
if [ `expr $I % 2 ` -eq 0 ];then
let SUM+=$I
fi
let I++
done
echo "The even sum is $SUM"
2.、vim even.sh
#!/bin/bash
I=0
SUM=0
until [ $I -gt 100 ];do
if [ $(($I % 2)) -eq 0 ];then
let SUM+=$I
fi
let I++
done
echo "The even sum is $SUM"
本文转自 张玉坡 51CTO博客，原文链接:http://blog.51cto.com/fighter/462540
