ValueError: invalid literal for int () with base 10

Question

I wrote a program to solve y = a^x and then project it on a graph. The problem is that whenever a < 1 I get the error:

V

Answer 1

It might be better to validate a right when it is input.

try:
  a = int(input("Enter 'a' "))
except ValueError:
  print('PLease input a valid integer')

This either casts a to an int so you can be assured that it is an integer for all later uses or it handles the exception and alerts the user