Understanding For Loops in C++

For loops are a fundamental concept in programming that allows you to execute a block of code multiple times. They are particularly useful when you know in advance how many times you want to repeat a set of instructions. Let’s break down the structure of a for loop:

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

• Initialization: This is where you set a starting point for your loop, often by declaring a variable.
• Condition: The loop continues to run as long as this condition is true.
• Increment: This updates the variable after each iteration, bringing it closer to the condition becoming false.

Example 1: Basic For Loop

Let’s look at a simple example where we print numbers from 1 to 5.

#include <iostream>

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

Explanation:

• We initialize i to 1.
• The loop continues as long as i is less than or equal to 5.
• After each iteration, we increment i by 1.
• The output will be:

1
2
3
4
5

Example 2: For Loop with Arrays

In this example, we’ll use a for loop to iterate through an array of numbers and print each one.

#include <iostream>

int main() {
    int numbers[] = {10, 20, 30, 40, 50};
    int length = sizeof(numbers) / sizeof(numbers[0]);

    for (int i = 0; i < length; i++) {
        std::cout << numbers[i] << std::endl;
    }
    return 0;
}

Explanation:

• We define an array called numbers containing five integers.
• We calculate the length of the array.
• The loop starts at index 0 and continues until it reaches the length of the array.
• It prints each element in the array:

10
20
30
40
50

Example 3: Nested For Loops

Nested for loops are useful when working with multi-dimensional data. Here’s how to create a simple multiplication table.

```cpp

include

int main() {
for (int i = 1; i <= 5; i++) {
for (int j = 1; j <= 5; j++) {
std::cout << i * j <<