A loop is a control-flow structure that repeats a block of code until a specific condition changes. Loops allow programs to process collections, perform repeated computations, or iterate through ranges of values. Common loop types include for, while, and do…while. Loops are essential for tasks like iterating arrays, aggregating numbers, or automating repetitive processes.
Why it matters
Loops are foundational to programming and algorithm design. Incorrect loop logic can create infinite loops, performance issues, or incorrect results. Understanding loops is essential for working with data structures, APIs, and asynchronous operations.
Examples
Iterating through an array of messages or incrementing a counter until it reaches a threshold. Lessons like What Is a Loop? introduce core loop behavior.