To get a value of an array at a specific index, we use square brackets [].
var arr = ['Johnny', 'David', 'Sarah'];
Click one of the below buttons to highlight the value by index
To get a value of a nested array, we use two square brackets []. The first one accesses values in the parent array, the second one accesses values in the nested array.
var arr = [['Johnny', 'David'], ['Tom', 'Paul']];
Click one of the below buttons to highlight the value by index