#!/bin/bash # testing string length#-n 判斷長度是否非零 #-z 判斷長度是否為零val1=testing val2=''if [ -n "$val1" ] then echo "The string $val1 is not empty" elseecho "The string $val1 is empty" fiif [ -z "$val2" ] then echo "The string $val2 is empty" elseecho "The string $val2 is not empty" fiif [ -z "$val3" ] then echo "The string $val3 is empty" elseecho "The string $val3 is not empty" fi

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轉載于:https://my.oschina.net/xufenfei/blog/877624

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