How to define functions in javascript_javascript skills

The following is the sample code for various methods

Copy the code The code is as follows:

The running result is:
Call the general method:
------------------ -------------------------------------------------- ------------
Call the constructor method: add1(5,6)
11
----------------- -------------------------------------------------- -------------
Call function direct measurement method: result(3,4)
7
Call function direct measurement method: result2(3)
6
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Function used as data
(2 3) (4*5 )=25
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hello world
100