This page has been translated automatically.
Programming
Fundamentials
Setting Up Development Environment
UnigineScript
High-Level Systems
C++
C#
UUSL (Unified UNIGINE Shader Language)
File Formats
Rebuilding the Engine and Tools
GUI
Double Precision Coordinates
API
Bounds-Related Classes
Containers
Controls-Related Classes
Core Library
Engine-Related Classes
GUI-Related Classes
Node-Related Classes
Pathfinding-Related Classes
Physics-Related Classes
Plugins-Related Classes
Rendering-Related Classes
Utility Classes
Внимание! Эта версия документация УСТАРЕЛА, поскольку относится к более ранней версии SDK! Пожалуйста, переключитесь на самую актуальную документацию для последней версии SDK.
Внимание! Эта версия документации описывает устаревшую версию SDK, которая больше не поддерживается! Пожалуйста, обновитесь до последней версии SDK.

If-Else

The if construct allows executing code fragments, if a certain condition is true. The optional else part executes some other code, if the condition is false.

Syntax

Source code(UnigineScript)
if(expression) { 
	// code_if_true
} else { 
	// code_if_false 
}

Parts

  • expression is a condition.

Example

Source code(UnigineScript)
int a = 2;
int b = 5;

if(a > b) {
	log.message("true\n");
} else {
	log.message("false\n");
}

// output: false

You can use if and else separetely.

Source code(UnigineScript)
int a=2;
if(a == 2) log.message("a is equal to 2\n");

// the result is: a is equal to 2

Notice
Note that if you use a complex boolean expression as a condition, the expression will be evaluated from the left to the right (short-circuit evaluation):
Source code(UnigineScript)
int func(int a) {
	return a;
}

// there will be only one (the first) call of func()
if(func(0) && func(1)) log.message("true\n");
// func() will be called twice
if(func(1) && func(1)) log.message("true\n");
// there will be only one (the first) call of func()
if(func(1) || func(1)) log.message("true\n");
// func() will be called twice
if(func(0) || func(1)) log.message("true\n");
Last update: 03.07.2017
Build: ()