Given a string, remove all leading and trailing spaces and collapse any sequence of consecutive spaces between words into a single space. Return an empty string if the input is null or blank.
Examples:
Input: text = ' hello world '
Output: 'hello world'
Explanation: Leading and trailing spaces removed, multiple spaces between words collapsed
Input: text = 'apex is fun'
Output: 'apex is fun'
Explanation: Multiple spaces between words reduced to single spaces
Input: text = ' salesforce '
Output: 'salesforce'
Explanation: Only leading and trailing spaces to remove
Input: text = ''
Output: ''
Explanation: Blank input returns empty string
Input: text = 'single'
Output: 'single'
Explanation: No extra spaces, return as-is
Apex Code Editor
Welcome to Lightning Challenge!
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 October 2026 (Oct 16–31)Sponsored by FLXBL
Contest runs October 16 - 31. Complete challenges to climb the leaderboard!
Prizes 1 & 2: Salesforce certification exam voucher — won by random drawing, where every point is a ticket. see all prizes
Only the 16 daily challenges shown during this contest count toward points. Earlier dailies don't carry over.