C++ For Loop – Share Query

The C++ for loop is a loop statement that allows you to execute a block of code repeatedly for a specified number of times. It is commonly used to iterate over arrays and other data structures.

Here’s the basic syntax of a for loop in C++:

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

Let’s break down each part of the syntax:

The initialization section is executed only once at the beginning of the loop. It usually declares and initializes a loop counter variable.
The condition section is checked at the beginning of each iteration. If it is true, the loop body is executed. If it is false, the loop terminates.
The increment section is executed at the end of each iteration. It usually increments the loop counter variable.

Here’s an example of a for loop that prints the numbers from 1 to 5:

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

In this example, the loop counter variable i is initialized to 1, and the loop continues as long as i is less than or equal to 5. After each iteration, i is incremented by 1.

The output of this program would be:

You can also use a for loop to iterate over an array. Here’s an example that prints the elements of an array:

int arr[] = {1, 2, 3, 4, 5};
for (int i = 0; i < 5; i++) {
  cout << arr[i] << endl;
}

In this example, the loop counter variable i is used to access each element of the array arr using the index i. The loop continues as long as i is less than the length of the array (which is 5 in this case).

The output of this program would be: