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Common Use Cases of The For Loop in C++

The primary purpose of a for loop is to iterate a predetermined number of times, it's important to note that these loops serve a broader range of applications and they are, in fact, the most frequently used type of loops in programming. Some of their use cases include:

  • Iterating through arrays and collections;

  • Generating sequences of numbers;

  • Implementing repetitive algorithms;

  • Calculations and simulations.

Let's look at the simple examples of these use cases:

cpp

iterating

cpp

generating

cpp

implementing

cpp

calculations

copy
#include <iostream>

int main() {
int numbers[5] = {1, 2, 3, 4, 5}; // Static array
// Using a for loop to iterate through the static array
for (int i = 0; i < 5; i++) {
std::cout << numbers[i] << " ";
}
}

              
12345678910

            
#include <iostream>

int main() {
    int numbers[5] = {1, 2, 3, 4, 5}; // Static array
    
    // Using a for loop to iterate through the static array
    for (int i = 0; i < 5; i++) {
        std::cout << numbers[i] << " ";
    }
}

As you can see they are used for a wide range of applications, from processing data and performing calculations to controlling program flow and handling complex algorithms. So it's important to get good with them. Let's practice!

Taak

Swipe to start coding

Write a program that calculates the sum of the products of all integers from 5 to 10 using a for loop.

  • Use a for loop to iterate through the numbers from 5 to 10.
  • Check in condition for for loop if i is less or equals (<=) to 10.
  • Calculate the cumulative product of the numbers as you loop through them.

Oplossing

cpp

solution

#include <iostream>

int main()
{
int product = 1;
for (int i = 5; i <= 10; i++)
{
product *= i;
}
std::cout << product;
}
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Sectie 2. Hoofdstuk 2
#include <iostream>

int main()
{
int product = 1;
for (___; ___ ; ___)
{
___ = ___;
}
std::cout << product;
}

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