replaceAll() is a string method. It is used to replace all occurrences of the specified substring inside a string with another substring. Syntax:actualString.replaceAll( oldSubstring, newSubstring…

The ‘late‘ keyword is used to declare non-nullable variables before their initialization. But that initialization will be done before that variable is accessed. Lets understand…

The double question mark operator checks if the variable specified at the left of this operator is null or not. If the left side variable…

There are two ways to create nullable variable. 1) Using var keyword, Syntax : var variable_name;2) Using datatypeSyntax : int? variable_name; Nullable variable creation using…