JSON data is written in key/value pairs. The key and value are separated by a colon(:) in the middle with the key on the left and the value on the right. Different key/value pairs are separated by a comma(,). The key is a string surrounded by double quotation marks for example “name”. The values can be of the following types.
String: Sequence of Unicode characters surrounded by double quotation marks.
Boolean: True or False.
Array: A list of values surrounded by square brackets, for example
Object: A collection of key/value pairs surrounded by curly braces, for example