Functions are bits of code that you would like to reuse.
This function will print hello to the console.
When we use a function, we call it a function call.
This is a function call.
Function calls are expressions. Meaning they will evaluate/simplify to a value. In terms of function calls, they will evaluate as whatever the function returns.
This will print "hello" to the console, but the value of val will be nil. Because foo() does not return anything. And nothing in Lua in nil.
If we want the function to not evaluate as nil then we use return
The value of val is now 5.
This is helpful because we can abstract tasks with multiple terms like this
1 | local function sum(a, b, c) |
5 | local val = sum(1, 2, 3) |
In this case val is 6. Because 1+2+3 is six.
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