Shell script only accepts string as an input. If integer - it exits.

#!/bin/bash

echo "Please enter your name: "

read name

if [[ $name -eq n ]];

then 

echo "Hi you are ok."

else 

echo "Usage: $0 Only string. No integers."

fi

Myhost:/tmp ./if1.sh 

Please enter your name: 

8

Usage: ./if1.sh Only string. No integers.

Happy Scripting!