📘 Lesson · Lesson 67

Inline Functions

What is an Inline Function?

💡 Note

An inline function asks the compiler to replace the function call with the function code directly — saving call overhead for small functions.

C++

#include <iostream>
using namespace std;
inline int square(int x) { return x * x; }
int main() {
    cout << square(5);   // 25
    return 0;
}

Output:
25

💡 Note

inline is only a request. The compiler may ignore it for large functions.

💡 Note

An inline function asks the compiler to replace the function call with the function code directly — saving call overhead for small functions.

C++

#include <iostream>
using namespace std;
inline int square(int x) { return x * x; }
int main() {
    cout << square(5);   // 25
    return 0;
}

Output:
25

💡 Note

inline is only a request. The compiler may ignore it for large functions.

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