Learn JavaScript from Scratch JavaScript for Everyone - Array Iteration

The video tutorial explains two methods for looping over arrays in JavaScript: the traditional 'for' loop and the modern 'forEach' function. It demonstrates how to use a 'for' loop to iterate over an array, highlighting the importance of setting a condition to avoid infinite loops. The tutorial then introduces the 'forEach' function, a more modern approach that simplifies the process by using a function to iterate over array elements. The video concludes by comparing both methods, emphasizing the prevalence of 'forEach' in modern JavaScript while acknowledging the continued relevance of 'for' loops for compatibility with older browsers.

What is the primary purpose of a 'for' loop in JavaScript?

• To create functions

• To declare variables

• To iterate over a collection of items

• To execute code once

Which of the following is a key component of a 'for' loop?

• Function declaration

• Array initialization

• Condition check

• String concatenation

How does the 'forEach' function differ from a 'for' loop?

• 'forEach' is used for strings only

• 'forEach' is a function, not a loop

• 'forEach' requires a condition

• 'forEach' is only for numbers

What modern JavaScript feature is used with 'forEach'?

• Promises

• Fat arrow functions

• Destructuring

• Template literals

Why is it important to have a proper condition in a loop?

• To make the code more readable

• To ensure the loop runs indefinitely

• To prevent the loop from executing

• To avoid crashing the browser