What does “macro” mean in Objective-C?

Question

I am new to iOS development and I just want to know the meaning of macro in Objective-C?

I have found that \"macro\" is used with #define but still do not get its meanin

Answer 1

Macros are compile time constants. That means they will replaced with actual values in the compile time.

#define MIN_VALUE 3 // Definition


if(x > MIN_VALUE) // Usage
{

}

While compiling it actually looks like

 if(x  > 3) // During compilation
  {

  }