defined

The defined operator can be used to write code that compiles or behaves differently based on target platform.

Syntax

defined(variable)

Where variable is one of:

• Debug
• WebGL
• Android
• Designer
• iOS
• OpenGL
• CIL
• CSharp
• CPlusPlus
• JavaScript

The defined operator returns a boolean compile-time constant, which means that the compiler may eliminate platform-irrelevant dead code if the expression is used as a conditional.

Example
if (defined(iOS))
{
    button.Text = "I love my iOS device";
}
else if (defined(Android))
{
    button.Text = "I wish i had an iOS device";
}