simple_calculator_in_loop.py

def simc():
    def add(a,b):
        z=a+b
        print("Sum is %d" % z)
    def sub(a,b):
        return a-b
    def mul(a,b):
        return a*b
    def div(a,b):
        return a/b
    def rem(a,b):
        return a%b

    print("Simple Calculator")
    while(1):
        print("1.Add\n2.Subtract\n3.Multiply\n4.Divide\n5.Remainder\n6.Exit")
        ch = int(input("Enter your choice: "))
        if (ch == 6):
            print("Thank you and Exiting")
            break
        else:
            a = int(input("Enter first number: "))
            b = int(input("Enter second number: "))
            if(ch==1):
                add(a,b)
            elif (ch==2):
                z=sub(a,b)
                print("Difference is %d"%z)
            elif(ch==3):
                z=mul(a,b)
                print("Product is %d"%z)
            elif (ch==4):
                z=div(a,b)
                print("Qoutient is %f"%z)
            elif (ch==5):
                z=rem(a,b)
                print("Remainder is %d"%z)
            else:
                print("Invalid input!")
            ch=input("Continue? (y/n): ")
            if(ch=="y"):
                continue
            elif(ch=="n"):
                break
            else:
                print("Invalid input!\nExiting.")
                break