测试开发进阶(四十)

$ echo $((10 + 20))# 30$ one=25$ two=12$ echo $((one+two))# 37

$ echo $((one>two))# 1$ echo $((one<two))# 0

$ echo $(expr $one+$two)# 25+12$ echo $(expr $one + $two)# 37

$ echo $(expr $one \> $two)$ echo $(expr $one \< $two)

$ [ 1 = 2 ] && echo "条件不成立"$ [ 1 = 2 ] || echo "条件不成立"$ test 1 = 2 && echo "条件不成立"$ test 1 = 2 || echo "条件不成立"

$ man [ ]$ man test

#!/bin/bash#Author:zhongxin

# 第一种方式$ bash 1126.sh# 第二种方式$ chmod +x 1126.sh$ ./1126.sh# 第三种方式$ source 1126.sh

#!/bin/bash#Author:zhongxin:<<!要注释的内容!pwd

#!/bin/bash函数名(){    ...}

#!/bin/bashfunction 函数名{    ...}

#!/bin/bash#Author:zhongxin:<<!要注释的内容!hello(){    echo "Hello,Shell"}hellofunction greet{    echo "Hello,zx"}greet

function greet{    echo "Hello,$1"    echo "Hello,$2"    echo "Hello,$3"}greet 'a' 'b' 'c'

greet $1 $2 $3

#!/bin/bash#Author:zhongxinread -p "请输入你的姓名:" nameread -p "请输入你的年龄:" ageread -p "请输入你的爱好:" function info{    # -e 运行\n换行    echo -e "你的姓名为:${name}\n你的年龄为:${age}\n你的爱好为:${REPLY}"}info

if [ 条件1 ]then    指令1elif [ 条件2 ]then    指令2else    指令2fi

#!/bin/bash#Author:zhongxinread -p "输入你的年龄:"if [ ${REPLY} -ge 70 ]then    echo "好好养生"elif [ ${REPLY} -ge 18 ]then    echo "好好工作"else    echo "好好学习"fi

for 值 in 列表do    执行语句done

dirs=$(ls /)for i in ${dirs}do    index=$((${index} + 1))    echo "${index}.${i}"done

max=10for ((i=1;i<=max;i++))do    执行语句done

#!/bin/bash#Author:zhongxinmax=10for ((i=0;i<=max;i++))do    echo "i=${i}"done