What is an inline function in C language?

The inline function can be substituted at the place where the function call is happening. Function substitution is always compiler choice.

• In an inline function, a function call is replaced by the actual program code.

• Most of the Inline functions are used for small computations. They are not suitable for large computing.

• An inline function is similar to a normal function. The only difference is that we place a keyword inline before the function name.

Inline functions are created with the following syntax −

inline function_name (){
   //function definition
}

Example

Following is the C program for inline functions −

#include<stdio.h>
inline int mul(int a, int b) //inline function declaration{
   return(a*b);
}
int main(){
   int c;
   c=mul(2,3);
   printf("Multiplication:%d
",c);
   return 0;
}

Output

When the above program is executed, it produces the following result −

6