Loops (for / while)
A for loop repeats a fixed number of times for ($i = 1; $i <= 5; $i++). A while loop repeats as long as a condition stays true, which is useful when you don't know the exact count in advance.
Why this matters
- ·Avoids repeating the same code manually many times
- ·for loops are ideal when the number of repetitions is known
Common mistakes
- ·Forgetting $i++ inside a while loop creates an infinite loop
- ·Off-by-one mistakes (<= vs <) are one of the most common loop bugs
Your codePHP
Expected output
1 2 3 4 5
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Frequently asked questions
Use the code editor above edit the example freely and check the expected output against your own reasoning.
Practice questions
Question 1
Write a for loop that prints only the even numbers from 1 to 10.
Your codePHP
Expected output
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Quick check
Just for this topic answer honestly, then check yourself.
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