用脚本实现1+2+3...100
1.用while方法实现
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#!/bin/bash
a=1
sum
=0
while
[ $a -
le
100 ]
do
# ((sum=sum+a))
# ((a++))
let
sum
=
sum
+a
let
a++
done
echo
"$sum"
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weilovepan520