In order to stimulate the pass-by-reference It is important to supply the address of a variable when passing a non-array variable to a function.
What is an array?
An array is a group of similar data elements kept in close proximity to one another in memory. The best way to retrieve each data element directly is by using its index number, making it the most basic data structure. In the majority of situations, a lot of data of the a similar type must be stored. It'd be extremely difficult to remember every variable name while coding the scripts. It is preferable to form an array and keep all the elements inside of it.
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