C++ Loops

What is Loops?

In C++, loops are used to repeatedly execute a block of code as long as a specified condition is true. There are three main types of loops in C++: 'for', 'while', and 'do-while'.

for loop:

The for loop is used when you know in advance how many times the loop should execute.

for (initialization; condition; update) {
    // code to be executed
}

while loop:

The while loop is used when you want to execute a block of code as long as a certain condition is true.

while (condition) {
    // code to be executed
}

do-while loop:

The do-while loop is similar to the 'while' loop, but the condition is checked after the execution of the loop, so it always executes at least once.

do {
    // code to be executed
} while (condition);

* Here's a comparison table of the three main types of loops

Why it's important?

Loops are essential in C++ (and in programming in general) because they allow you to execute a block of code repeatedly based on a certain condition. Here are some reasons why loops are important in C++: Iteration, Code Reusability, Efficiency, Dynamic Execution, etc.

Note: loops are crucial in C++ because they provide a mechanism for efficient and flexible repetition, allowing you to write more versatile and maintainable code.

Loop Control Elements:

Initialize: Before entering a loop, control variables must be initialized. The initialization expressions are executed only once at the beginning of the loop.

Expression: The test expression is an expression whose truth value decides whether the loop body will be executed or not. If the expression evaluates to true (1), the loop body will be executed otherwise the loop is terminated.

Update: The updated expressions change the values of loop variables. The update expressions are executed at the end of the loop (;) after the loop body is executed.

Body-of-the Loop: The statements are executed repeatedly (as long as the test expression is nonzero) from body-of-the loop.