Standard_Calculator.py

print("=" * 40)
print("Welcome To Standard Calculator")
print("=" * 40)


def pause():
    input("Press Enter to continue...")




def input_num():
    while True:

        count = int(input("How many numbers you want to enter: "))
            
        if count <= 0:
            print("Invalid Input. You must enter at least one positive number.")
            continue 
            
        count_list = []
        for i in range(1, count + 1):
            n = float(input(f"Enter number {i}: "))
            count_list.append(n)
            
        return count_list




# FUNCTION 1
def add():
    num = input_num()
    result = num[0]

    for i in num[1 : ]:
        result += i

    print(f"\nTotal Sum= {result}\n")



# FUNCTION 2
def subtract():
    num = input_num()
    result = num[0]

    for i in num[1 : ]:
        result -= i

    print(f"\nTotal Difference= {result}\n")



# FUNCTION 3
def multiply():
    num = input_num()
    result = num[0]

    for i in num[1 : ]:
         result *= i

    print(f"\nTotal Product= {result}\n")



# FUNCTION 4
def divide():
    a = float(input("Enter Dividend: "))
    b = float(input("Enter Divisor: "))

    if b == 0: 
        print(f"\nDivision of {a} by {b} is Undefined\n")
    else:
        result = a / b
        print(f"\nDivision of {a} by {b} = {result}\n")



# FUNCTION 5
def remainder():
    a = float(input("Enter Dividend: "))
    b = float(input("Enter Divisor: "))

    if b == 0: 
        print(f"\nRemainder of {a} by {b} is Undefined\n")
    else:
        result = a % b
        print(f"\nRemainder of {a} by {b} = {result}\n")



# FUNCTION 6
def reciprocal():
    num = float(input("Enter a number: "))

    if num == 0:
        print("\nReciprocal = Undefined\n")
    else:
        result = 1 / num
        print(f"\nReciprocal = {result}\n")



# FUNCTION 7
def square():
    num = float(input("Enter a number: "))

    result = num ** 2
    print(f"\nSquare = {result}\n") 



# FUNCTION 8
def square_root():
    num = float(input("Enter a number: "))

    if num == 0:
        print("\nSquare Root = 0\n")
    elif num < 0:
        print("\nSquare Root is IMAGINARY\n")
    else:
        result = num ** (1/2)
        print(f"\nSquare Root = {result}\n") 



# FUNCTION 9
def cube():
    num = float(input("Enter a number: "))

    result = num ** 3
    print(f"\nCube = {result}\n")



# FUNCTION 10
def cube_root():
    num = float(input("Enter a number: "))

    if num >= 0:
        result = num ** (1/3)
    else:
        result = -((-num) ** (1/3))

    print(f"\nCube Root = {result}\n")

    




def main():
    while True:
        print("\nChoose an OPERATION to perform:")
        print("=" * 40)
        print("1. Add")
        print("2. Subtract")
        print("3. Multiply")
        print("4. Divide")
        print("5. Remainder")
        print("6. Reciprocal (1/x)")
        print("7. Square (x²)")
        print("8. Square Root (√x)")
        print("9. Cube (x³)")
        print("10. Cube Root (∛x)")
        print("11. Exit")
        print("=" * 40)

        choice = int(input("\nEnter Your Choice: "))
        print("=" * 40)

        match choice:
            case 1:
                add()
                pause()

            case 2:
                subtract()
                pause()

            case 3:
                multiply()
                pause()

            case 4:
                divide()
                pause()

            case 5:
                remainder()
                pause()

            case 6:
                reciprocal()
                pause()

            case 7:
                square()
                pause()

            case 8:
                square_root()
                pause()

            case 9:
                cube()
                pause()

            case 10:
                cube_root()
                pause()

            case 11:
                break

            case _:
                print("Invalid Choice")
                pause()

        

main()