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check if variable is a number in bash Code Example
check if variable is a number in bash 
re='^[0-9]+$'
if ! [[ $yournumber =~ $re ]] ; then
   echo "error: Not a number" >&2; exit 1
fi
Source: stackoverflow.com



Shell

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Type:
 Code Example
Category:
 Coding
Sub Category:
 Code Example
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Horje