How to code a calculator

Question

I keep trying but it isn't working. Please anyone help me
https://sololearn.com/compiler-playground/cMJYvPV87vFL/?ref=app

Answer 1

@Ikechika Dickson
You had problems with your indention and some syntax errors and also some incomplete exception handling...
I have edited your code to the bare minimum and simple to understand, please note the indention.
Now its working perfectly. Below is the code.

#======== START OF CODE ========

first_number=int(input("Please enter first number: "))
print(first_number)
second_number=int(input("Please enter second number: "))
print(second_number)
operator = input("Choose an operation (+) or (-):")

if(operator[0]=="+"):
result = first_number + second_number
elif(operator[0]=="-"):
result = first_number - second_number

print(operator[0])
print("Your answer is" , result)

#======== END OF CODE ========

Let me know if you want me to add exception handling

Answer 2

The error message should be pretty clear - unexpected indent. Python uses indentation to distinguish structeres (e.g. where if starts and ends). Your indents are all messed up.

Answer 3

@CodeVortex
I have redone the solution to be more complete with exception handling.
https://www.sololearn.com/en/compiler-playground/c2vUxCe0092Y try and play with it there i have also tried to comment most of the lines so you can understand.

Incase you have a question, let me know.

Answer 4

1. your indentations are all wrong.
2.you can't concatenate strings and numbers
3.you have to assign the '+' or '-' operation to a variable
4.your conditions do not need to be in parenthesis, and the syntax is wrong for if(+).

print("please enter two numbers")
try:
first_number=int(input())
second_number=int(input())
print(first_number, second_number)
except ValueError:
print('please enter a valid number')

print("choose an operation (+) or (-)")
try:
operation = input()
print(operation)
if(operation == "+"):
result = first_number + second_number
elif(operation == "-"):
result = first_number - second_number
else:
print('please enter + or -')

print(first_number, operation, second_number, "=", result)
except EOFError:
print('please enter a valid operation')

Answer 5

Can you code one and show me 🥲

Answer 6

mashtullah
Please explain better