If-Else
Warning
UnigineScript is deprecated and will be removed in future releases. Please consider using C#/C++ instead, as these APIs are the preferred ones. Availability of new Engine features in UnigineScipt is not guaranteed, as the current level of support assumes only fixing critical issues.
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: falseYou 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:
2020-04-10
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