ValueError: invalid literal for int() with base 10: '' using input function

[RobinAves]

So I am trying to learn int and float by this script I got from a book.
And it doesn't work

[avan]

Hello @RobinAves

A few things to point out.

1. input() takes a string to display and the it is up to the user to enter a value. As long as the input is a valid int you should be safe to convert the input to int
2. To print a variable value you just need to use the literal without quotes.

Here is a slightly modified version of your code that should work.

svar = input('Enter a number')
x =int(svar)
y = x * x
print(y)