do...while Loop — JS Technical Interview Questions & Answers

Runs the body at least once before checking the condition.

do...while Loop

  • do...while Loop (js) is a JS topic. In plain words you use it for pass if marks >= 40 in a result script. Don’t start with a slogan — start with that picture.
  • Smallest example: if (marks >= 40) { … }. Type it, run it, and say what you see. If you can do that from memory, you know do...while Loop (js).
  • From the example next to this theory: Runs the body at least once before checking the condition.
  • Trap: assignment = inside if instead of ===. Fix that before you talk about advanced JS.
  • Viva: what is do...while Loop (js)? Then show if (marks >= 40) { … }. Then name the trap.

Technical Interview Tip: What is do...while Loop (js)? Show this: if (marks >= 40) { … }. Trap: assignment = inside if instead of ===.

Code Examples for do...while Loop

do...while Loop — working example

for (let i = 1; i <= 3; i++) {
  if (i === 2) continue;
  console.log("for", i);
}

let n = 3;
while (n > 0) {
  console.log("while", n);
  n -= 1;
}

const user = { name: "Ada", city: "Pune" };
for (const key in user) console.log(key, user[key]);

for (const ch of "JS") console.log(ch);

do...while Loop — for/while/do-while repeat work; for...in walks keys; for...of walks iterable values.

How to Explain do...while Loop to an Interviewer

What is do...while Loop (js)?

Used for pass if marks >= 40 a result script Not just the heading

Give one small example of do...while Loop (js).

if (marks >= 40) { … } Runs the body at least once before checking the condition

What mistake do beginners make with do...while Loop (js)?

assignment = inside if instead of === Show the fix

Where do you use do...while Loop (js)?

a result script pass if marks >= 40