#!/bin/bash
i=4
if [ $i -lt 5 ];then
echo "22222222222";
fi
a=3
if [ $a -ne 1 -a $a != 2 ];then
echo "33333333333";
fi
if [ $a -ne 1 ] && [ $a != 2 ];then
echo "444444444444";
fi
if [[ $a != 1 && $a != 2 ]];then
echo "5555555555";
fi
b2=2
c3=3
if [ $b2 -gt $c3 ];then
echo "$b2 > $c3"
else
echo "$c3 > $b2"
fi
if [ $b2 -gt $c3 ];then
echo "$b2 > $c3"
elif [ $b2 -eq $c3 ];then
echo "$b2 = $c3"
else
echo "$b2 < $c3"
fi
for i in $(seq 0 4);do
echo $i;
done
for i in `seq 0 4`;do
echo $i;
done
for ((i=0;i<5;i++));do
echo $i;
done
for i in {0..4};do
echo $i;
done
if語句和for語句
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