Linux之判断字符串是否为空
help命令可以查看帮助
help test
正确做法:
#!/bin/sh
STRING=
if [ -z "$STRING" ]; then
echo "STRING is empty"
fi
if [ -n "$STRING" ]; then
echo "STRING is not empty"
fi
每天进步一点点,快乐生活多一点。
help命令可以查看帮助
help test
正确做法:
#!/bin/sh
STRING=
if [ -z "$STRING" ]; then
echo "STRING is empty"
fi
if [ -n "$STRING" ]; then
echo "STRING is not empty"
fi