P3.2: JS Control Flow & Loops

Control flow allows programs to make decisions and execute code repeatedly.

1. Conditionals (if/else)

Decisions are evaluated using Boolean logic:

const score = 85;
if (score >= 90) {
  console.log("Grade A");
} else if (score >= 80) {
  console.log("Grade B");
} else {
  console.log("Try again!");
}

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JavaScript SpecsJSON StandardLinting Tools

“Always use strict equality operators (=== and !==) instead of loose comparisons (==). Loose comparisons execute silent type conversions, leading to bugs.”

2. Iteration Loops (for & while)

Execute blocks multiple times:

for (let i = 0; i < 5; i++) {
  console.log("Iteration: " + i);
}