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Home/Coding/Java Master Course/Fundamentals

while Loop

Last Updated : 26 May, 2026

title: while Loop in Java

Fundamentals63 words5 headingsExamples included

title: while Loop in Java description: while loop ka use aur examples

Jab pata nahi kitni baar loop chalana hai, while use karo.

Syntax

java exampleWoHoTech

while (condition) {
    // code
    // update
}

Basic Example

int i = 1; while (i <= 5) { System.out.println(i); i++; }

User Input tak loop chalao

java exampleWoHoTech

Scanner sc = new Scanner(System.in);
int n = 0;
while (n != -1) {
    System.out.print("Number daalo (-1 quit): ");
    n = sc.nextInt();
    if (n != -1) System.out.println("Aapne dala: " + n);
}

Digits count karo

int num = 12345; int count = 0; while (num != 0) { num /= 10; count++; } System.out.println("Digits: " + count); // 5

for vs while — Kab Kya?

for — Jab iterations ka pata ho: for(int i=0; i<n; i++)
while — Jab condition par depend ho, iterations unknown

Exam Focus

Revise definitions, diagrams, examples, and short-answer points for while Loop.

Interview Use

Prepare one clear explanation, one practical example, and one common mistake for this Java topic.

Search Terms

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Related Java Topics

Continue learning this concept

Fundamentalsdo-while Looptitle: do-while Loop in Java Fundamentalsfor Looptitle: for Loop in Java FundamentalsNested Loopstitle: Nested Loops in Java Fundamentalsbreak aur continuetitle: break aur continue in Java Fundamentalsif-else Statementstitle: if-else in Java Fundamentalsswitch-case Statementtitle: switch-case in Java

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