Capitalize the first letter of each word in a string.

Description

Write a method that takes a string and returns it with the first letter of each word capitalized. Words are separated by spaces.

Examples:

Input: "hello world" Output: "Hello World" Explanation: The first letter of each word is capitalized. Input: "apex programming language" Output: "Apex Programming Language" Explanation: Each word starts with a capital letter. Input: "a b c" Output: "A B C" Explanation: Single letters are also capitalized. Input: "" Output: "" Explanation: Empty string returns empty string.
Apex Code Editor
Sign in to Submit

Welcome to Lightning Challenge!

Create an Account

Sign up to track your progress, earn points, and compete with others. Your solutions will be saved automatically.

Create account

How It Works

  • • Write your solution in the code editor
  • • Connect your Salesforce org to test
  • • Submit to check if your solution passes
  • • Use hints if you get stuck

Contest Alert

🏆 #CodeEveryDay Feb 2026

Contest runs February 1 - 28. Complete challenges to climb the leaderboard!

Points are calculated for challenges completed during the contest period.