005_logical_AND_operator.sh

#! /bin/bash
age=50

# if [ "$age" -gt 18 -a "$age" -lt 30 ]  alternate choise of and opr. 
# if [[ "$age" -gt 18 && "$age" -lt 30 ]]  alternate choise of and opr. 


if [ "$age" -gt 18 ] && [ "$age" -lt 30 ]
then
    echo "valid age"
    else
    echo "age not valid"
fi