🟡 Control Flow · Lesson 17

for Loop in C++

What is for Loop in C++?

for Loop in C++
A for loop repeats a block when the number of repetitions is known or controlled by a counter.

Level
🟡 Control Flow and Core Programming

Example File
for-loop.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
initialization	Initialization used in for Loop in C++ programming.
condition	Condition used in for Loop in C++ programming.
update	Update used in for Loop in C++ programming.
iteration	Iteration used in for Loop in C++ programming.
counter	Counter used in for Loop in C++ programming.

Syntax / Pattern

for(initialization; condition; update) { statements; }

Example Program

#include <iostream>
using namespace std;
int main(){
    for(int i=1; i<=5; i++){
        cout << i << " ";
    }
    return 0;
}

Expected Output

1 2 3 4 5

Program Explanation

i starts from 1.
Loop runs while i <= 5.
i++ increases counter after each iteration.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

tables
patterns
array traversal

Common Mistakes

Creating infinite loops.
Wrong start/end condition.

Practice Tasks

Print table of 7.
Print first 10 natural numbers.

Summary

for Loop in C++ is an important C++ topic. Learn the definition, understand the syntax, run the example program and then solve the practice tasks to make the concept strong.