Clean Code in JavaScript

Conventional for

The conventional for statement is used to iterate over all manner of data structures or conceptual looping scenarios. It includes three expressions, parenthesized and separated by semicolons, and a statement at the end, which is considered the body of the iteration:

for (  InitializerExpression;  ConditionExpression;  UpdateExpression) IterationBody

The purpose of each part is as follows:

• The InitializerExpression initializes the iteration; this will be evaluated first and only once. This can be any statement (it usually includes a let or var assignment, but doesn't need to).
• The ConditionExpression checks whether the iteration may continue; this will be evaluated and coerced to a Boolean (as if via Boolean(...)) before each ...