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In computer programming, the return type defines and constrains the type of value returned from a method or function. In many programming languages (especially those that are statically-typed, such as Java, C++, C) the return type must be explicitly specified when declaring a function.
In the Java example:
public int someMethod()
the return type is int. The program can therefore rely on the method returning a value of type int. Various mechanisms are used for the case where a subroutine that does not return any value, e.g., a return type of void in some programming languages:
public void returnNothing()
See also
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