In programming, null is a special value that represents the absence of a value or a null reference. It is typically used to indicate that a variable or object does not currently point to any valid data or does not have a meaningful value.
nullis often used to initialize variables or objects when you want to indicate that they have not yet been assigned a value.- In some programming languages,
nullis distinct fromundefined, which typically represents a variable that has been declared but not yet assigned a value.
Example (JavaScript):
let value = null; // value is explicitly set to null
let obj = null; // obj is set to null to indicate that it does not currently reference an object
console.log(value); // Output: null