Learn Python · lesson 21 of 24
Functions: your own instructions
Write a function called cheer that prints Hip hip hooray! and call it twice.
Learn
A function is a named set of steps you can use again. def starts it, then the name, brackets and a colon, with the steps indented below. Calling it by name, greet(), runs those steps. Define a function before you call it.
Your task
Write a function called cheer that prints Hip hip hooray! and call it twice.
← Dictionaries: labels and valuesGiving a function information →
Press Run to see what your program prints.
More in this module
Keep going in Learn Python
Giving a function information
Write a function double that returns its input times 2, and print double(21).
Start →23Functions that decide
Write is_even(n) that returns True for even numbers and False for odd ones, then use it in a loop to print the even numbers from 1 to 6.
Start →24Project: a quiz scorer
Write a function score(answers) that counts how many answers equal "yes", then print the result as You scored 3 out of 5 (use the length of the list for the out of number).
Start →Practise the idea
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Functions: your own instructions: common questions
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