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Python User Input

What you'll learn

  • Understand the main ideas in Python User Input.
  • See a working example and explanation to help you learn by doing.
  • Follow a clear path to the next lesson in this topic.

When to use this lesson

Use this lesson when you want to understand the key concepts behind Python User Input.

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Python User Input

Python allows for user input. That means we are able to ask the user for input.

The method used to capture user input in Python 3.6+ is the input() function.

(Note: In Python 2.7, the function was called raw_input())

Using the input() Function

The program pauses execution when it encounters the input() function and waits for the user to type some text and press Enter.

Basic Input

username = input("Enter username: ")
print("Username is: " + username)

Input is Always a String

It is critical to remember that the input() function always returns a string (str), even if the user types a number. If you need to perform mathematical calculations on user input, you must cast it using int() or float().

Casting User Input

age = input("Enter your age: ")
// age is currently a string! Let's cast it:
age_num = int(age)
print(f"In 5 years you will be {age_num + 5}.")
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