C++ Looping structures (for, while, do-while)

 In C++, there are three main types of looping structures: for, while, and do-while loops.

The for loop is a looping structure that executes a block of code repeatedly for a fixed number of times. The general syntax of a for loop is as follows:

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

For example:

for (int i = 0; i < 5; i++) { cout << i << endl; }

In this example, the for loop will execute the block of code 5 times, with the value of i starting at 0 and incrementing by 1 on each iteration, until i is no longer less than 5.

The while loop is a looping structure that executes a block of code repeatedly while a condition is true. The general syntax of a while loop is as follows:

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

For example:

int i = 0; while (i < 5) { cout << i << endl; i++; }

In this example, the while loop will execute the block of code repeatedly as long as the value of i is less than 5, and the value of i will be incremented by 1 on each iteration.

The do-while loop is a looping structure that executes a block of code repeatedly at least once, and then continues to execute the block of code while a condition is true. The general syntax of a do-while loop is as follows:

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

For example:

int i = 0; do { cout << i << endl; i++; } while (i < 5);

In this example, the do-while loop will execute the block of code at least once, and then continue to execute the block of code while the value of i is less than 5.