For Loop in C++

A for loop in C++ is a control flow statement that allows you to repeatedly execute a block of code a certain number of times. The syntax of a for loop in C++ is as follows:

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

Let's break down each part of the for loop:

  1. Initialization: This is where you initialize the loop control variable(s). It is typically used to set the initial value of the loop control variable(s). For example, int i = 0 initializes the loop control variable i to 0.

  2. Condition: This is the condition that is checked before each iteration of the loop. If the condition evaluates to true, the loop continues executing. If the condition evaluates to false, the loop terminates and control passes to the next statement after the loop. For example, i < 10 is a condition that checks if i is less than 10.

  3. Update: This is where you update the loop control variable(s) after each iteration of the loop. It is typically used to increment or decrement the loop control variable(s). For example, i++ increments the value of i by 1 after each iteration.

  4. Code to be executed: This is the block of code that is executed for each iteration of the loop. It can contain any valid C++ code, such as variable declarations, assignments, function calls, etc.

Here's an example of a for loop that prints the numbers from 0 to 9:

for (int i = 0; i < 10; i++) {
    cout << i << " ";
}

In this example, the loop control variable i is initialized to 0. The condition i < 10 is checked before each iteration of the loop. If the condition is true, the code inside the loop is executed, which in this case prints the value of i followed by a space. After each iteration, i is incremented by 1 (i++).

The output of this code will be:

0 1 2 3 4 5 6 7 8 9

This is because the loop iterates 10 times, with i taking on the values 0, 1, 2, ..., 9.

I hope this explanation helps! Let me know if you have any further questions.