shell中判断变量是否为整型,字符,字符串等的函数

来源：互联网发布：佛教直播软件编辑：程序博客网时间：2024/05/18 18:54

#!/bin/bashfunction check(){    local a="$1"    printf "%d" "$a" &>/dev/null && echo "integer" && return    printf "%d" "$(echo $a|sed 's/^[+-]\?0\+//')" &>/dev/null && echo "integer" && return    printf "%f" "$a" &>/dev/null && echo "number" && return    [ ${#a} -eq 1 ] && echo "char" && return    echo "string"}echo ". is" $(check ".")echo "1 is" $(check "1")echo ".1 is" $(check ".1")echo "1. is" $(check "1.")echo "1234 is" $(check "1234")echo "1.234 is" $(check "1.234")echo "1.2.3.4 is" $(check "1.2.3.4")echo "a1234 is" $(check "a1234")echo "abc is" $(check "abc")echo "a is" $(check "a")echo "1e+2" $(check "1e+2")echo "1.e+2" $(check "1e+2")echo ".1e+2" $(check "1e+2")echo "-1" $(check "-1")echo "-1.2" $(check "-1.2")echo "-a" $(check "-a")echo "0x1f" $(check "0x1f")echo "0x1H" $(check "0x1H")echo "0333" $(check "0333")echo "0999" $(check "0999")echo "+003" $(check "+003")echo "+003.3" $(check "+003.3")

输出结果为：

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