PROGRAM Persegi, Segitiga, Luas Lingkaran, Luas layang layang

 PROGRAM Persegi, Segitiga, Luas Lingkaran, Luas layang layang

#!/bin/bash
lagi='y'
while [ $lagi == 'y' ] || [ $lagi == 'Y' ];
do
clear
echo "=====================================";
echo "            MENU PROGRAM             ";
echo "=====================================";
echo "1. Persegi";
echo "2. Segitiga";
echo "3. Luas Lingkaran";
echo "4. Luas layang layang";
echo "5. Exit";
echo "=====================================";
read -p "Masukkan Pilihan Anda [1-5]: " pil;
echo "";

case $pil in

1)    echo -n "Masukkan  Sisi 1: ";
    read sisi1
    echo -n "Masukkan Sisi 2: ";
    read sisi2
echo -n "Masukkan Sisi 3: ";
    read sisi3
    let luas=$sisi1*sisi2*sisi3
    echo ""
    echo "============================="
    echo "       LUAS PERSEGI         "
    echo "============================="
    echo "Luas Persegi: $luas"
    echo "============================="
    ;;
2)    echo -n "Masukkan Alas: ";
    read alas
    echo -n "Masukkan Tinggi: ";
    read tinggi
    let luas=$alas*$tinggi/2
    echo ""
    echo "============================="
    echo "       LUAS SEGITIGA         "
    echo "============================="
    echo "Alas: $alas"
    echo "Tinggi: $tinggi"
    echo "Luas: $luas"
    echo "============================="
    ;;
3)    echo " Masukkan nilai jari-jari lingkaran"
    read r
    h=`echo 22/7*$r*$r|bc`
    echo "Luas lingkaran = $h";;

4)    echo -n "Masukkan Diagonal1: ";
    read diagonal1
    echo -n "Masukkan Diagonal2: ";
    read diagonal2
    let luas=$diagonal1*diagonal2/2
    echo ""
    echo "============================="
    echo "       LUAS LAYANG LAYANG         "
    echo "============================="
    echo "Luas: $luas"
    echo "============================="
    ;;  
5)    exit
    ;;
*)    echo "Maaf, Pilihan Tidak tersedia"
esac
echo""
echo -n "UTS BY PUTRA HERMANTO PANJAITAN"
echo ""
echo -n "Ingin Lanjut ke Program Yang Lain? [y/n]: ";
read lagi;
while [ $lagi != 'y' ] && [ $lagi != 'Y' ] && [ $lagi != 'n' ] && [ $lagi != 'N' ];
do
echo "Maaf, input yang anda masukkan salah";
echo -n "Ingin Lanjut ke Program Yang Lain? [y/n]: ";
read lagi;
done
done