A mutable object can be changed after it's created, and an immutable object can't. That said, if you're defining your own class, you can make its objects immutable by making all fields final and private. ... Or, you can convert the string to an array of characters, which will be mutable.

What is difference between mutable and immutable data type?

If the value can change, the object is called mutable, while if the value cannot change, the object is called immutable.

What is mutable and immutable give example?

Simple put, a mutable object can be changed after it is created, and an immutable object can't. Objects of built-in types like (int, float, bool, str, tuple, unicode) are immutable. Objects of built-in types like (list, set, dict) are mutable. Custom classes are generally mutable.