JS arrays Flashcards
1
Q
What are arrays used for?
A
create and store a list of multiple items in a single variable/ data for the same type
2
Q
Describe array literal notation.
A
square brackets with values separated by commas
3
Q
How are arrays different from “plain” objects?
A
arrays store lists of data with numbered indexes, whereas objects store key-value pairs unordered
4
Q
What number represents the first index of an array?
A
zero, [0]
5
Q
What is the length property of an array?
A
arrayName.length
6
Q
How do you calculate the last index of an array?
A
arrayName.length -1
