front-end-developer_1_

Front-End-Developer - Level 1
3. 3 + 5 is run.
4. The result of 3 + 5 is returned.
5. The add function ends.
Notice our variables names: number1 and number2 . We could have called them n1 and
n2 , and it would have taken less typing. But the name number1 very clearly expresses
what the variable is for, whereas n1 will require another programmer (or your future self,
when you come back to your code in a few months and don't remember exactly how it
works) to figure it out from context. In this example, it would be pretty obvious what n1 is
for. But if you practice choosing descriptive names now and resisting the temptation to
abbreviate, you will be in the habit of doing it when you're writing more complex code where
it matters more.
Summary
Example function:
var add = function(number1, number2) { return number1 + number2; };
add(1, 2);
An argument is what you pass into a function or method; a parameter is a variable that's
assigned to the argument. Above, number1 and number2 are parameters, and 1 and 2
are arguments.
Use descriptive variable names so that your code is easily readable. Don't be tempted to
abbreviate.
Writing functions
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