Loops in C++

C++ 125 views Dec 22, 2025 2 min read

A loop is used to execute a block of code repeatedly until a specified condition is met.

Types of Loops in C++

C++ provides three types of loops:

Used when the number of iterations is known.

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

for (int i = 1; i <= 5; i++) {
    cout << i>" ";
}

Used when the number of iterations is not known in advance.

while (condition) {
    // statements
}

int i = 1;
while (i <= 5) {
    cout << i>" ";
    i++;
}

Executes the loop body at least once, even if the condition is false.

do {
    // statements
} while (condition);

int i = 1;
do {
    cout << i>" ";
    i++;
} while (i <= 5);

Feature	for	while	do–while
Condition check	Before loop	Before loop	After loop
Guaranteed execution	No	No	Yes
Best used when	Iterations known	Condition-based	At least one execution

A loop inside another loop.

for (int i = 1; i <= 3; i++) {
    for (int j = 1; j <= 3; j++) {
        cout << "* ";
    }
    cout << endl>

Statement	Purpose
`break`	Terminates the loop
`continue`	Skips current iteration

Loops are essential in C++ for performing repetitive tasks efficiently and logically.

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