C++ If Statement

The if statement in C++ is used to execute a block of code based on a condition. It allows decision-making in programs and is one of the most basic control flow structures.

1. Basic If Statement

The simplest form of the if statement executes a block of code when the condition evaluates to true.

#include <iostream>
using namespace std;

int main() {
    int num = 10;
    if (num > 0) {
        cout << "Number is positive" << endl;
    }
    return 0;
}

2. Common Mistakes

Avoid missing braces for multiple statements and ensure conditions are properly written with relational operators.

#include <iostream>
using namespace std;

int main() {
    int num = 5;
    if (num > 0) 
        cout << "Positive" << endl;
        cout << "This will always execute" << endl; // Misleading without braces
    return 0;
}

Conclusion

C++ if statements are the foundation of conditional logic. Learning proper usage of if statements helps control the flow of your programs effectively.