Numeric check

mirage · #1 (**permalink**) 11-16-02, 05:11

I am trying to read a variable

read $2

how can I check whether the entered string is a number?

Thanks.

Damian Ibbotson · #2 (**permalink**) 11-18-02, 12:16

echo $yourvar | grep "^[0-9][0-9]*$" && print numeric || print non-numeric

pstireman · #3 (**permalink**) 06-25-03, 13:24

Here is another way to do it. This way will check decimals as well as whole numbers.

let TST=$1*1 && print $1 numeric || print $1 non-numeric 2>/dev/null

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