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How to check whether the given value from the command line is a string or not in bash scripting?

eg: I will give input as stackoverflow from the command line and my bash script should check the given value is a string(i mean a sequence of characters) or a numeric value.

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  • And what is your criterion for something, being a string? Bash is an untyped language, so it's not so clear what is a string, and what is not. Commented Mar 14, 2018 at 0:58
  • Please, read how to ask useful questions. Commented Mar 14, 2018 at 1:26
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    All values in bash are sequences of characters (except when declare -i is in use, but it's poor form). Even 12 is a sequence of characters (first the character 1, then the character 2); and when you run newvar=$(( 12 + 1 )), the value of 13 resulting from that is a string as well. Commented Mar 14, 2018 at 1:41
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