一个简单的sum求和
#! /bin/bash## For get the sum of tow numbers## Writen by Qinys## Date:2018-06-26a=1b=2sum=$[$a+$b]echo "$a+$b=$sum"
上述是一个简单的shell脚本求和
a与b分别是变量,上述脚本的意思是对a,b两个变量分别赋值,然后求和
数学计算要用[]括起来并且外面加一个“$”
根据输入值进行求和
#! /bin/bash## Input param to sum## Writen by Qinys## Date:2018-06-26read -p "Please input a number:" xread -p "Please input another number:" ysum=$[$x+$y]echo "The sum of the two numbers is:$sum"
使用read –p输入相应的参数,注意:在x前边是有引号的
shell中预设变量的使用
#! /bin/bash## Writen by Qinys## Date:2018-06-22sum=$[$1+$2]echo "sum's value is : $sum"
运行结果为