Loops in C

📘 C 👁 62 views 📅 Dec 22, 2025

⏱ Estimated reading time: 1 min

Loops are used to execute a block of code repeatedly as long as a specified condition is true.

Types of Loops in C

for loop
while loop
do–while loop

1. for Loop

Used when the number of iterations is known.

Syntax

for (initialization; condition; increment/decrement) {
    statements;
}

Example

for (int i = 1; i <= 5; i++) {
    printf("%d ", i);
}

2. while Loop

Used when the condition is checked before execution.

Syntax

while (condition) {
    statements;
}

Example

int i = 1;
while (i <= 5) {
    printf("%d ", i);
    i++;
}

3. do–while Loop

Used when the loop must execute at least once.

Syntax

do {
    statements;
} while (condition);

Example

int i = 1;
do {
    printf("%d ", i);
    i++;
} while (i <= 5);

Differences Between Loops

Feature	for	while	do–while
Condition check	Before loop	Before loop	After loop
Minimum execution	0 times	0 times	At least 1 time
Use case	Known count	Unknown count	Execute once minimum

Loop Control Statements

break

Terminates the loop.

break;

continue

Skips the current iteration.

continue;

Nested Loops

A loop inside another loop.

for (int i = 1; i <= 3; i++) {
    for (int j = 1; j <= 3; j++) {
        printf("* ");
    }
    printf("\n");
}

Summary

Loops repeat execution of statements
for loop is used for fixed iterations
while loop checks condition first
do–while loop executes at least once
break and continue control loop flow

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Control Statements in C

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Loops in C

⏱ Estimated reading time: 1 min

Types of Loops in C

1. for Loop

Syntax

Example

2. while Loop

Syntax

Example

3. do–while Loop

Syntax

Example

Differences Between Loops

Loop Control Statements

break

continue

Nested Loops

Summary

Control Statements in C

Functions in C

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