Anil Singh | Code-sample.com

The variable is simply a name of storage location and all variables must be identified with unique names and these unique names are called identifiers. Note –   I am using the “ let ” keyword instead of “ var ” keyword. The “ let ” keyword is actually a newer JavaScript construct that TypeScript makes available. Actually, many common problems in JavaScript are reducing by using “ let ” keyword. So we should use “ let ” keyword instead of “ var ” keyword. Stayed Informed – Learn Angular 2 A variable contains values such as "Hi" or 22. When you use the variable, you refer to the data it represents. For example – let name: string = "Hi" ; //var name: string = "Anil Singh"; let num: number = 22; //var num: number = 22; There are some rules while declaring variables i.e. 1.      The variable names must begin with a letter 2.      The variable names can contain letters, digits, underscores, and dollar signs. 3...