What is JSON?

JSON is a lightweight data interchange format, also known as JavaScript Object Notation. It is based on the object literal syntax of JavaScript and is used for exchanging and storing structured data between different systems. JSON data is presented in a human-readable and machine-parsable text format, with excellent cross-platform compatibility.

Feature

• Simplicity: JSON uses key-value pairs to represent data, making it easy to understand and write.
• Readability: JSON data is displayed in a text format, making it human-readable and easy to edit.
• Cross-platform compatibility: JSON is a universal data format that can be easily parsed and generated across different systems.

Structure

JSON data consists of a collection of key-value pairs, separated by commas, and enclosed in curly braces. Here’s an example of a basic JSON structure:

{
  "key1": "value1",
  "key2": 123,
  "key3": ["array", "values"],
  "key4": {
    "nested_key": "nested_value"
  }
}

1. Data format:

   • JSON data must be represented using key-value pairs enclosed in curly braces.
   • Each key-value pair is separated by a colon, and pairs are separated by commas.
   • Keys must be strings enclosed in double quotes.
   • Values can be strings, numbers, booleans, arrays, objects, or null.

2. String format:

   • Strings must be enclosed in double quotes.
   • Strings can contain escape characters, such as \n for newline.

3. Number format:

   • Numbers can be integers or floating-point numbers.
   • Numbers can be represented using scientific notation, such as 1.23e-4.

4. Boolean and null values:

   • Booleans can only be true or false.
   • Null represents an empty value and is represented as null.

5. Array format:

   • Arrays are represented using square brackets.
   • Values within the array are separated by commas.
   • Arrays can contain different types of values, such as strings, numbers, objects, etc.

6. Object format:

   • Objects are represented using curly braces.
   • Key-value pairs within the object are separated by commas.
   • Keys must be strings enclosed in double quotes.
   • Values can be of any type.

7. Comments:

   • JSON does not support comments.
   • Comments cannot be included in JSON data.

Following these rules ensures that your JSON data is formatted correctly and adheres to the standard. This improves the accuracy and reliability of data exchange between different systems.