The Enumerate Function

Part of the Fundamentals section of Coddy's Python journey — lesson 61 of 77.

The enumerate() function allows you to loop through a sequence (like a list, tuple, or string) while keeping track of the index position of each item.

without enumerate() we would access both the index and the value the following way:

fruits = ["apple", "banana", "orange"]
for i in range(len(fruits)):
    print(f"Index {i}: {fruits[i]}")

enumerate() is a more elegant way to get both index and value:

fruits = ["apple", "banana", "orange"]
for index, fruit in enumerate(fruits):
    print(f"Index {index}: {fruit}")

Both examples will output:

Index 0: apple
Index 1: banana
Index 2: orange

Challenge

Easy

Write a program that processes a list of numbers and finds specific indices using the enumerate() function.

Task: Given a comma-separated list of numbers as input, print a list of the indices of numbers that meet either of these conditions:

The number is below 50, OR
The number is divisible by 5 (remainder is 0 when divided by 5)

Example:

Input: 80,4,99,36,34

80 (index 0): ≥50 but divisible by 5 → include index 0
4 (index 1): <50 → include index 1
99 (index 2): ≥50 and not divisible by 5 → exclude
36 (index 3): <50 → include index 3
34 (index 4): <50 → include index 4

Output: [0, 1, 3, 4]

Cheat sheet

The enumerate() function allows looping through a sequence while tracking the index position of each item:

fruits = ["apple", "banana", "orange"]
for index, fruit in enumerate(fruits):
    print(f"Index {index}: {fruit}")

This outputs:

Index 0: apple
Index 1: banana
Index 2: orange

Try it yourself

lst = list(map(int, input().split(",")))
# Write your code below

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction

The Language Hello World!Comments

4Operators Part 2

Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic Logical Operators Part 3 Logical Operators Part 4

7Bill Split Calculator

Welcome Message Getting Input

Calculating The Tip And Total

Splitting The Bill

Formatted Output

10FizzBuzz with a Twist

Game Overview The FizzBuzz Function

Looping The Numbers

Adding The Twist

13Lists Advanced

List Slicing Part 1 List Slicing Part 2 Sequence Operators Membership

3Operators Part 1

Arithmetic Operators Modulo Operator Arithmetic Shortcuts Recap - Simple Math Comparison Operators

6Basic IO

Output Output With Variables Input Cast Recap - Till 120 Recap - True or False

9Functions

Declare a Function Arguments Return Recap - Sigma Function Recap - Validation Function Default Values

12Iterating Over Sequences

Iterating Over ElementsThe Enumerate FunctionIterating Over Strings Part 1 Iterating Over Strings Part 2

15Final Challenges

Flat Asterisk Pyramid Pattern Finder What To Buy