Excel has over 475 formulas in its Functions Library, but we've selected the most popular, from date and time functions to mathematics and simple data manipulation.

Java’s main function is void, which means it does not return any value when it completes. main – When the JVM starts a standalone application, the main method is the function that gets invoked. String ...

Function<Integer, String> functionClass = new FunctionClass(); System.out.println(functionClass.apply(2)); When you run the above code, the output would be four. Java Function interface example.