I’m trying to make a online calculator without any errors.
c gets a input it is supposed to calculate the answer and print it
But when a or b is not an integer then it is supposed say “ the first input and the second input needs to be a number”
Although a and b were a integer/number it still responded with “the first input and the second input needs to be a number”
isdigit() method to check whether it is a number or not
On your code:-
a = input() if a.isdigit():
However, if you want to take the user’s input as an integer directly and you expect the input to be a number, then it would be more efficient to use the
int() function. This function will try to convert the input to an integer, and if it is not a number, it will raise a
ValueError exception which you can catch and handle as appropriate.
try: a = int(input("Enter a number: ")) print("The number you entered is: ", a) except ValueError: print("Invalid input, please enter a number.")