Numbers and strings

Numbers can be whole (int) or fractional (float). Operators: + - * /, integer division //, remainder %, power **.

print(7 // 2)   # 3
print(7 % 2)    # 1
print(2 ** 10)  # 1024

Strings (str) go in quotes. Get a character by its index starting at zero; split() cuts a string by spaces:

word = "Python"
print(word[0], word[-1])      # P n
print("one two".split())      # ['one', 'two']

f-strings put values right into text:

name, score = "Anna", 95
print(f"{name} scored {score} points")

Starter functions

From this topic on, many challenges come with a def name(...): stub. Write your code inside it and give back the answer with return — functions are covered in detail later.