Array is a structured data which holds different types(string, array, object) of values and one or more values in a single variable, for example if you want to store 50 different types of values in a single variable instead of storing in 50 separate variables the array would help in that situation.
There is three different types of array available,
1. Numeric Array :
The array stored value's index will define by numbers, the index will be starting from zero.