Javascript-arrays Flashcards
1
Q
What are arrays used for?
A
Arrays are used to store a list of values that are related to each other.
2
Q
Describe array literal notation.
A
An array consists of a square bracket that holds a list of values, separated by commas. And it’s assigned to a variable.
3
Q
How are arrays different from “plain” objects?
A
The values in an array is stored in index number, while the values in an object is stored in a property.
4
Q
What number represents the first index of an array?
A
0.
5
Q
What is the length property of an array?
A
It’s the number of items in an array.
6
Q
How do you calculate the last index of an array?
A
Use the length property of the array and minus 1.
