[: missing `]' error in shell, already have spaces before and after the code in []

Question

code:

if [ $mintemp -ge 15 && $maxtemp -le 28 ]; then echo "nice day"; fi

I already have spaces between [ and $Mintemp , 28 and ]

but the error still happend

Related: Multiple logical operators, ((A || B) && C), and “syntax error near unexpected token” — steeldriver, Apr 16 '19 at 14:18
Are you using /bin/bash or /bin/sh? If you're using bash specifically, use [[ ... ]] instead of [ ... ] and then && is OK. — glenn jackman, Apr 16 '19 at 15:02

score 2 · Accepted Answer · answered Apr 16 '19 at 14:15

2

&& is not a [] argument (since [ is actually a program), it is Bash's operator for running second command if the first one succeeds. So for bash your script looks like:

if ([ $mintemp -ge 15) && ($maxtemp -le 28 ]; then echo "nice day"; fi)

Which is invalid. You can however do it like:

if [ $mintemp -ge 15 ] && [ $maxtemp -le 28 ]; then echo "nice day"; fi

answered Apr 16 '19 at 14:15

Mateusz Kubuszok

143

thanks, but another error happends: [: too many arguments – Yiling Liu Apr 16 '19 at 14:19

[: missing `]' error in shell, already have spaces before and after the code in []

1 Answers1