linux shell数字怎么比较大小,Linux Shell 数字计算与比较

直接上脚本，

使用$(())以及$[]进行数字计算

数值比较：

n1 -eq n2检查n1是否等于n2         n1 -le n2检查n1是否小于等于n2

n1 -ge n2检查n1是否大于等于n2     n1 -lt n2检查n1是否小于n2

n1 -gt n2检查n1是否大于n2         n1 -ne n2检查n1是否不等于n2

#!/bin/bash

numa=;

numb=;

numc1=$(($numa - $numb));

numc2=$[$numa + $numb];

echo "numc1 = $numc1, numc2 = $numc2"

if [ $numc1 -lt ]

then

echo "numc1 less then 0"

fi

if [ $numc2 -gt ]

then

echo "numc2 great then 0"

fi

numd1=$(($numc1 + ));

numd2=$[$numc2 - ];

echo "numd1 = $numd1, numd2 = $numd2"

if [ $numd1 -gt $numd2 ]

then

echo "numd1 great then numd2"

else

echo "numd1 not great then numd2"

fi

参考：

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