4.70 inline functions in C99

The C99 keyword inline hints to the compiler that invocations of a function qualified with inline are to be expanded inline.

For example:
inline int max(int a, int b)
{
    return (a > b) ? a : b;    
}
The compiler inlines a function qualified with inline only if it is reasonable to do so. It is free to ignore the hint if inlining the function adversely affects performance.

Note

The __inline keyword is available in C90.

Note

The semantics of inline in C99 are different to the semantics of inline in Standard C++.
Related concepts
4.62 New language features of C99
4.64 // comments in C99 and C90
4.65 Compound literals in C99
4.66 Designated initializers in C99
4.67 Hexadecimal floating-point numbers in C99
4.68 Flexible array members in C99
4.69 __func__ predefined identifier in C99
4.71 long long data type in C99 and C90
4.72 Macros with a variable number of arguments in C99
4.73 Mixed declarations and statements in C99
4.74 New block scopes for selection and iteration statements in C99
4.75 _Pragma preprocessing operator in C99
4.76 Restricted pointers in C99
4.78 Complex numbers in C99
4.19 Inline functions
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