Inline Function

Inline function in c++ is a function for which the compiler copies the code from the function definition directly into the code of the calling function rather than creating a separate set of instructions in memory. Inline function is an enhancement feature that improves the execution time and speed of the program.

Syntax
inline returnType functionName(){
    //codes
}

CODE

EG 1 . Creating an inline function called cube.

#include <iostream>
using namespace std;

inline int cube(int number){
    return number*number*number;
}

int main() {
    int result = cube(3);
    cout << result << endl;
}

OUTPUT
27

CODE EXPLANATION
In the above code, we created an inline function called cube. Inside main method we created a new variable called result where we store the value of invoked inline cube method. In the above code, compiler will copy the definition of the function(number*number*number) directly into the code of the calling function rather than creating a separate set of instructions in memory.


Where to use inline functions?
The main use of the inline function in C++ is to save memory space. Whenever the function is called, then it takes a lot of time to execute the tasks, such as moving to the calling function. If the length of the function is small, then the substantial amount of execution time is spent in such overheads, and sometimes time taken required for moving to the calling function will be greater than the time taken required to execute that function.

Exercises
1. Create inline function for square, Degree2Radian, Celsius2Fahrenheit

(Click Here, For more exercises)