Cpp For Loop

C++ for loop

Created By: chatGPT

For loops in C++ are used to iterate over a range of values. The general syntax includes initialization, a condition, and an increment or decrement operation. Here's how you can structure a for loop:

for (initialization; condition; increment) {
    // code to be executed in each iteration
}

Let's look at a simple example that prints numbers from 1 to 5. In this example, we will initialize a variable, check if it is less than or equal to 5, and then increment it in each iteration.

#include <iostream>

int main() {
    for (int i = 1; i <= 5; i++) {
        std::cout << i << std::endl;
    }
    return 0;
}

In this code:

We include the iostream library to use std::cout.
The for loop begins with int i = 1, meaning we start counting from 1.
The condition i <= 5 keeps the loop running until i exceeds 5.
The statement i++ increments i by 1 with each iteration.
Inside the loop, we output the value of i. When you run this program, you will see the numbers 1 through 5 printed on separate lines.

You can also use a for loop with arrays. Here's an example where we iterate through an array of integers and compute their sum.

#include <iostream>

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int sum = 0;
    int length = sizeof(arr) / sizeof(arr[0]);

    for (int i = 0; i < length; i++) {
        sum += arr[i];
    }

    std::cout << "Sum: " << sum << std::endl;
    return 0;
}

In this example:

We declare an array arr containing five integers.
We initialize a variable sum to 0 to hold the total.
We determine the length of the array using sizeof(arr) / sizeof(arr[0]).
The for loop iterates from 0 to length - 1, adding each element of arr to sum.
Finally, the total sum is printed out.