Theory
Since we’re going to create a calculator, we somehow need to interact with a user - ask them to enter numbers, and then provide a result.
Let’s now learn how to enter data in the terminal using Python. For that we use the input() function.
About input():
- We can put some text inside the
input()function. - It will print this text first, and then will wait for user text data.
- You have to press the Enter key to actually execute it.
Example
- Run the below code:
1
input('enter your name: ')
- Enter your name and hit the enter key.
Here is what happens:
- As you noticed nothing happens after you hit the enter key.
- The program just stops.
- This is expected since we don’t yet use the name we entered in the program.
- To actually use the entered name we need to learn about variables in the next step.
python_input_function_example_visualized
Python Input function example visualized
Practice
Let’s now practice how to enter data.
- Ask a user to enter two numbers
- Use two
input()statements for that - The result should look like this:
1 2
enter first number: 70 enter second number: 7
Solution
1
2
input('enter first number: ')
input('enter second number: ')