Contoh Program If Bersarang pada Python

Listing Program

x=0
while x!=3:
    print '===================='
    print '====== Log In ======'
    print '===================='
    a=raw_input('Username: ')
    b=raw_input('Password: ')
    if a == 'Adjie' and b == 'blank':
        print 'Login Successed'
        print ''
        print ''
        print ''
        print ''
        y=0
        while y!=1:
            print '=============================='
            print '============ Menu ============'
            print '=============================='
            print '= 1. Luas Segitiga ='
            print '= 2. Luas Persegi ='
            print '= 3. Luas Lingkaran ='
            print '= 4. Kalkulator ='
            print '= 5. Array Nama ='
            print '= 6. Deret Fibonacci ='
            print '= 7. Deret Bilangan Ganjil ='
            print '= 8. Deret Bilangan Genap ='
            print '= 9. Deret Bilangan Asli ='
            print '= 10. Keluar ='
            print '=============================='
            c=raw_input('Masukkan Menu Pilihan di Atas: ')
            if c == '1':
                 alas=float(input('Masukkan Alas Segitiga: '))
                 tinggi=float(input('Masukkan Tinggi Segitiga: '))
                 print 'Luas Segitiga:',alas*tinggi/2
                 print ''
                 if y!=1:
                    bb=raw_input('Do You Want to Exit (y/n)? ')
                    if bb=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '2':
                 sisi=input('Masukkan Sisi Persegi: ')
                 print 'Luas Persegi:',sisi**2
                 print ''
                 if y!=1:
                    bc=raw_input('Do You Want to Exit (y/n)? ')
                    if bc=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '3':
                 jari_jari=float(input('Masukkan Jari-jari Lingkaran: '))
                 print 'Luas Lingkaran:',3.14*jari_jari*jari_jari
                 print ''
                 if y!=1:
                    bd=raw_input('Do You Want to Exit (y/n)? ')
                    if bd=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '4':
                 ab=float(input('Masukkan Angka Pertama: '))
                 ac=float(input('Masukkan Angka Kedua: '))
                 print 'Hasil Penjumlahan:',ab+ac
                 print 'Hasil Pengurangan:',ab-ac
                 print 'Hasil Perkalian:',ab*ac
                 print 'Hasil Pembagian:',ab/ac
                 print 'Hasil Modulus:',int(ab%ac)
                 print ''
                 if y!=1:
                    be=raw_input('Do You Want to Exit (y/n)? ')
                    if be=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '5':
                 data=input('Masukkan Banyak Data: ')
                 base=[]
                 loop=0
                 while loop!=data:
                    print 'Masukkan Nama ke ',loop+1,': ',
                    nama=raw_input()
                    base.append(nama)
                    loop=loop+1
                 if loop == data:
                    print 'Nama-nama yang Telah Dimasukkan:', base
                 print ''
                 if y!=1:
                    bf=raw_input('Do You Want to Exit (y/n)? ')
                    if bf=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '6':
                 angka=input('Masukkan Panjang Deret: ')
                 d = [0,1]
                 for z in range (angka):
                    if z>1:
                         print d[z-1]+d[z-2],
                         d.append(d[z-1]+d[z-2])
                    else:
                         print d[z],
                 print ''
                 print ''
                 if y!=1:
                    bg=raw_input('Do You Want to Exit (y/n)? ')
                    if bg=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '7':
                 ganjil=input('Masukkan Angka Deret yang Terakhir: ')
                 def bilanganganjil(af):
                    while af!=ganjil:
                         print af,
                         af=af+2
                    print ganjil
                 bilanganganjil(1)
                 print ''
                 if y!=1:
                    bh=raw_input('Do You Want to Exit (y/n)? ')
                    if bh=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '8':
                 genap=input('Masukkan Angka Deret yang Terakhir: ')
                 def bilangangenap(ag):
                    ag=ag-1
                    while ag!=genap:
                         print ag,
                         ag=ag+2
                    print genap
                 bilangangenap(1)
                 print ''
                 if y!=1:
                    bi=raw_input('Do You Want to Exit (y/n)? ')
                    if bi=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '9':
                 asli=input('Masukkan Panjang Deret: ')
                 def bilanganasli(az):
                    az=az-1
                    while az!=asli:
                         az=az+1
                         print az,
                    print ''
                    print ''
                 bilanganasli(1)
                 if y!=1:
                    bj=raw_input('Do You Want to Exit (y/n)? ')
                    if bj=='y':
                         print 'Program Close'
                         print ''
                         break
                    else:
                         print 'Back to Menu'
                         print ''
            elif c == '10':
                 ex=raw_input('Are You Sure to Exit (y/n)? ')
                 if ex == 'y':
                    print 'Program Exit'
                    print ''
                    break
                 else:
                    print 'Program Back to Menu'
                    print ''
            else:
                 print 'Program Back to Menu'
                 print ''
    elif a == 'exit' and b == 'exit':
        e=raw_input('Are You Sure to Cancel Login (y/n)? ')
        if e == 'y':
            print 'Program Close'
            print ''
            break
        else:
            print 'Please Try Again to Login'
            print ''
    elif a == 'Adjie' or b == 'blank':
        print 'Username or Password is Incorrect'
        print 'Please Try Again'
        print ''
    else:
        print 'Please Try Again'
        print ''
    x=x+1
if x==3:
    print 'You Have Three Times to Login'

Output Program