How does linux determine whether a string is a number
This article introduces the relevant knowledge of "how to judge whether a string is a number by linux". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
Judgment method: 1. Use "$value" | [- n "`value-n'/ ^ [0-9] [0-9] * $/ p'`"] statement; 2. Use "grep'^ [[: digit:]] * $'
