subtraction

multiplication

division

2. we can use loops for if the user needs to do calculations multiple times

sin cos tan

value of π

using percentage

Addition

Multiplication

Division

Trignometric functions

We can use loops so that the user can perform multiple functions

We will import math, define functions and ask for input and then return output and so on.

Subtraction

Multiplication

Division

Clear

Decimal

Evaluate Expression

LOOPS:

We may have a loop that continuously waits for user input until they choose to exit the program.

Include different components like number buttons, operator buttons, clear buttons, and an equals button. The interface should be intuitive and user-friendly, facilitating easy input and interaction

Basic 4:

• Addition

• Subtraction

• Multiplication

• Division

More can be added (like exponents, roots, pi, trignometric ratios, etc.)

Loops:

The actual "app" itself would run off a while loop, so that the user can input multiple functions. Otherwise, most functions wouldn't need them

Method:

• Define the functions.

• Use a while loop to rerun the code.

• Ask for inputs based on function being run

• Output answer

• Ask user if they want to try any more functions (if they say no, terminate the loop. if they say yes, restart.)

Code:

def add(num1, num2):

return num1 + num2

def subtract(num1, num2):

return num1 - num2

def multiply(num1, num2):

return num1 * num2

def divide(num1, num2):

try:

return num1 / num2

except ZeroDivisionError:

return("You tried to divide by 0!")

def main():

rerun_code = True

while rerun_code:

try:

operation = int(input("Enter a number: \n1. Add \n2. Subtract \n3. Multiply \n4. Divide \n"))

except ValueError:

print("Please enter a number!")

continue

if operation != 1 and operation != 2 and operation != 3 and operation != 4:

print("Please enter a valid number.")

continue

while True:

try:

num1 = int(input("Number 1: "))

num2 = int(input("Number 2: "))

except ValueError:

print("Please enter a number!")

continue

else:

break

if operation == 1:

print(add(num1, num2))

elif operation == 2:

print(subtract(num1, num2))

elif operation == 3:

print(multiply(num1, num2))

elif operation == 4:

print(divide(num1, num2))

rerun = input("Do you want to do another calculation? (Y/N) \n")

if rerun.lower() == "y":

rerun_code = True

elif rerun.lower() == "n":

rerun_code = False

else:

print("Please enter Y or N.")

if __name__ == "__main__":

main()

We probably will need to use loops for error navigation

Loops: we can use a user input loop to continuously ask the user for various inputs like a while loop. We are also going to be requiring loops for handling invalid values as well as error handling loops(like checking for division with zero) until a valid value is provided.

Method:

We are going to define functions and operations and implement mechanisms to ask user for input, calculating using the required operations and asking the output to be displayed to the user. We can also add scientific functions like sin, cos,tan etc.

1. addition

2. subtraction

3. division

4. multiplications

2) Modules:

math module for: (square root, pi etc.)

3) exception handling (e.g. division by error)

4) The app would run off a while loop

num1=0

num2=0

while_continue=0

def addition_function(num1,num2):

return sum(num1,num2)

def subtraction_function(num1,num2):

return num1-num2

def multiplication_function(num1,num2):

return num1*num2

def division_function(num1,num2):

return num1/num2

def main():

ans=0

running=True

while running:

print("welcome to the calculator")

num1=int(input("Enter a number"))

num2=int(input("Enter another number"))

op=input("Enter opperation [+ - * /]")

if op=="+":

ans= addition_function(num1,num2)

print("Your answer is:",ans)

elif op=="-":

ans=subtraction_function(num1,num2)

print("Your answer is:",ans)

elif op=="*":

ans=multiplication_function(num1,num2)

print("Your answer is :",ans)

else:

try:

if num2!=0 and op=="/":

ans=division_function(num1,num2)

print("Your answer is:",ans)

except ZeroDivisionError:

print("You cant divide by zero")

else:

print("Invalid opperation")

will_continue=input("Do you want to continue? [y/n]")

print(will_continue)

if will_continue=="y":

running=True

elif will_continue=="n":

running=False

print("Program has ended")

if name == "__main__":

main()

define functions for addition, subtraction, multiplication, division.

loops can be used to perform continuous functions until the user chooses to exit.

the four basic operations:

division

multiplication

addition

subtraction

additionally:

trigonometric functions

exponential functions

logarithmic functions

inbuilt value of pi

etc

Q2: can be used for multiple values using list comprehension

Q3.

Take user input to use values

take user input for what is to be done for values

write code for basic functions

code to give value for task asked

print result

Loops are used for repetitive tasks and iterating over data collections by repeating a block of code based on specific conditions like based on the operator used.

We receive inputs from the user and then, depending on the chosen operator, conditions are evaluated and the function is executed accordingly.

return x + y

def sub(x, y):

return x - y

def mul(x, y):

return x * y

def div(x, y):

return x / y

def main():

running = True

while running:

num1 = int(input("Enter number 1: "))

num2 = int(input("Enter number 2: "))

op = input("Enter operation(+ - * /):")

if op=="+":

ans = add(num1, num2)

print("Answer: ",ans)

elif op=="-":

ans = sub(num1, num2)

print("Answer: ",ans)

elif op=="*":

ans = mul(num1, num2)

print("Answer: ", ans)

elif op=="/":

if num2!=0:

ans = div(num1, num2)

print("Answer: ", ans)

else:

print("Error, division by 0")

else:

print("Please pick one from (+ - * /")

will_continue = input("Type 'yes'to continue and 'no' to exit")

if will_continue=="no":

running = False

if name == "__main__":

main()

-Addition

-Subtraction

-Multiplication

-Division

(Others include squares, roots, decimals, fractions)

Loops to be used for user input if it needs to be done multiple times

We will import math, define the functions, use loops, ask for input call the functions and so on

2- code would run on a while loop

3- defining functions, asking for input, output answer

Functions:

addition

subtraction

multiplication

division

clear option

delete option

2) Loops would be needed as every person would enter numbers and do calculations.

3) I'm not so sure about it but first we would need to define and declare the functions and variables we would be using and put those in a loop so we can do calculations over and over again

trigonometric ratios

the square and cube roots

power , percentage and log functions

set values of pi and e

the app may need to run on loop itself unless it is turned off

it may also run on loop to input as many values as a function requires

Addition, subtraction, Multiplication, Division, Trigonometric functions e.t.c

2. loops are used to perform continuous functions and so that the user can input multiple functions. If the user puts an invalid value, then a loop can be used to make the user keep inputting values until they get a valid response.

3. first define the functions. user would input the information and then the specific functions required would be called and it would be run so that the output is displayed.

• addition

• Subtraction

• Multiplication

• Division

• Cos , sin , tab

A while loop will be required for complex functions but basic functions can be done without the whole loop

Menu of operations to choose from

Defining the functions

Defining basic calculator logic

def add (x,y):

return x+y

def subtract (x,y):

return x-y

def mul (x,y):

return x*y

def div (x,y):

return x/y

# let's start writing our main function where we will make our calculator app

def main():

running = True

while running == True:

num1= int(input("Enter a number:"))

num2= int(input("Entera number:"))

op= input("Enter operation (*, +, /, -)):")

if op =="+":

ans=add(num1, num2)

print ("Answer:", ans)

elif op =="-":

ans= subtract(num1, num2)

print ("Answer:", ans)

elif op =="*":

ans= mul(num1, num2)

print ("Answer:", ans)

else:

if num2 == 0:

print ("Error: cannot divide by zero")

else:

ans= div(num1, num2)

print ("Answer:", ans)

will_continue = input ("Type yes to continue or no to exit:")

if will_continue == "no":

running = False

running = True

while running:

num1 = int(input("Enter a number: "))

num2 = int(input("Enter a number: "))

op = input("Enter an operation(+ - * /): ")

if op == "+":

print("Answer: " , num1 + num2)

elif op == "-":

print("Answer: " , num1 - num2)

elif op == "*":

print("Answer: " , num1 * num2)

elif op == "/":

if num2 != 0:

print("Answer: " , num1 / num2)

else:

print("Cannot divide by zero")

else:

print("please choose from these operations + - * /")

will_run = input("Type yes to continue , Type no to stop: ")

if will_run == "no":

running =False

if name == "__main__":

main()

return a + b

def sub(a, b):

return a - b

def mul(a, b):

return a * b

def div(a, b):

return a / b

def main():

running=True

while running:

num1 = int(input("Enter number 1: "))

num2 = int(input("Enter number 2: "))

op = input("Enter operation (+ - * /): " )

if op == "+":

ans = add(num1, num2)

print("Answer: ", ans)

elif op == "-":

ans = sub(num1, num2)

print("Answer: ", ans)

elif op == "*":

ans = mul(num1, num2)

print("Answer: ", ans)

elif op == "/":

ans = div(num1, num2)

print("Answer: ", ans)

else:

print("Please pick one from")

while_continue = input("Type yes to continue or no to exit")

if while_continue == "no":

running = False

if name == "__main__":

main()

return a+b

def subtract(a, b):

return a-b

def multiply(a, b):

return a*b

def divide(a, b):

return a/b

def main():

running= True

while True:

a=int(input("enter number 1: "))

b=int(input("enter number 2: "))

op=input("please enter the operation you would like to perform, +, -, *, /: ")

if op=="+":

ans=add(a,b)

print("the answer is = ", ans)

elif op=="-":

ans=subtract(a,b)

print("the answer is = ", ans)

elif op=="*":

ans=multiply(a,b)

print("the answer is = ", ans)

elif op=="/" and b==0:

print("Zero error: Cannot divide by zero")

elif op=="/":

if b==0:

print("zero error: cannot divide by zero")

else:

ans=divide(a,b)

print("the answer is = ", ans)

else:

print("invalid operator, pick +, -, * or /")

cont=input("do you want to continue? y/n: ")

if cont=='n':

running=False

main()

return x + y

def subtract(x, y):

return x - y

def multiply(x, y):

return x * y

def divide(x, y):

return x / y

cont="yes"

running=True

while running:

try:

num1 = int(input("Enter first number: "))

except ValueError:

print("Invalid input. Please enter a number.")

continue

try:

num2 = int(input("Enter second number: "))

except ValueError:

print("Invalid input. Please enter a number.")

continue

op = input("Enter operator: +, -, / or *: ")

if op == "+":

ans = add(num1, num2)

elif op == "-":

ans = subtract(num1, num2)

elif op == "*":

ans = multiply(num1, num2)

elif op == "/":

ans=divide(num1, num2)

if num2 == 0:

print("Zero division error")

ans = divide(num1, num2)

else:

print("Invalid operator")

print("Answer:", ans)

cont = input("Do you want to continue? (yes or no)")

if cont == "no":

running = False