Linux （加、减、乘、除）实例详解

#!/bin/bash
 
num1=10
num2=2
 
#两个数相加
add=$[$num1+$num2]
echo $num1 + $num2 '=' $add
 
#两个数相减
sub=$[$num1-$num2]
echo $num1 - $num2 '=' $sub
 
#两个数相乘
mut=$[$num1*$num2]
echo $num1 '*' $num2 '=' $mut
 
#两个数相除
div=$[$num1/$num2]
echo $num1 / $num2 '=' $div
 
#固定值
temp=$[$num1*10]
echo $num1 '*' 10 '=' $temp