c++ forloop

A for loop in C++ is a control structure that allows you to repeatedly execute a block of code. It consists of three parts: initialization, condition, and increment.

  1. Initialization: This is the first part of the for loop and is executed only once at the beginning. It initializes a variable that will be used in the loop. For example, "int i = 0;" initializes a variable named "i" to 0.

  2. Condition: This is the second part of the for loop and is evaluated before each iteration. If the condition evaluates to true, the loop body is executed. If it evaluates to false, the loop is terminated. For example, "i < 10;" checks if the value of "i" is less than 10.

  3. Increment: This is the third part of the for loop and is executed after each iteration. It updates the value of the loop variable. For example, "i++;" increments the value of "i" by 1 after each iteration.

Here is 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 initialization part int i = 0; initializes the variable "i" to 0. - The condition part i < 10; checks if the value of "i" is less than 10. - The increment part i++; increments the value of "i" by 1 after each iteration. - The loop body cout << i << " "; prints the value of "i" followed by a space.

The output of this code will be: "0 1 2 3 4 5 6 7 8 9", each number separated by a space.