Lab 2_Shell Script

#!/bin/sh
# myshell.sh
    echo "welcome to use $0"
    echo "your target is $1"

Hello(){

    echo "welcome to the summoner's rift"
}
Hello;

ans=$1
start=1
end=10
dex=1

while [ $dex -lt 10 ]; do
    echo "Plese enter a number between $start and $end:"
    read input

    if [ $input -gt $end ]; then
        echo "wrong input!"
    elif [ $input -gt $ans ]; then
        end=`expr $input - 1`
    elif [ $input -lt $ans ]; then
        start=`expr $input + 1`
    else
        echo "BINGO!"
        break
    fi
    dex=`expr $dex + 1`
done