The value is calculated as (length of myName + i)
for(var j = i; j < (length of myName + i); j++){
emptyArray.push(text[j]);
}
The value is calculated as (length of myName + i)
for(var j = i; j < (length of myName + i); j++){
emptyArray.push(text[j]);
}
While not strictly required, parentheses in code serve a similar purpose as they do in algebra: to clarify groupings and order of operations. Just like how the presence or absence of parentheses can change the meaning of an algebraic expression, using them in code can help make your intentions clear.
x = (y + 3) * z
is not the same as
x = y + 3 * z
JavaScript might interpret both expressions similarly without the parentheses, but including them can make the logic more apparent to others reading your code.
Seems like they are ensuring proper evaluation methods. Take a peek at operator precedence.
Expanding on @theatlasroom's response, this concept could be referred to as grouping. Essentially, you are incrementing a value by +1 that is derived from myName.length without causing any issues before or after it.
In JavaScript, this comparison could occur prior to adding the extra length of myName + 1
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