Iteration

Why Loops Exist. Iteration means repeating a block of code. Instead of copying statements over and over, a loop runs the same code while a condition stays true. The simplest loop in Java is the while loop . How a while Loop Works. A while loop checks its boole

8 lessons, each with runnable code in the browser.

1. The while Loop
2. The for Loop
3. Loop Boundaries and Off-by-One Errors
4. Accumulation and Counting Patterns
5. String Traversals with Loops
6. Nested Loops
7. Nested Loop Patterns and Dependent Bounds
8. Informal Runtime Comparison

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