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

NoticeNote 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

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