Mention what is the difference between Swift and ‘Objective-C’ language?

Swift

Objective-C

In a swift, the variable and constants are declared before their use You have to use “let” keyword for constant and “var” keyword for variable There is no need to end code with semi-colon Concatenating strings is easy in swift and allows to make a new string from a mix of constants,  literals, variables, as well as expressions Swift does not require to create a separate interface like Objective C. You can define classes in a single file (.swift) Swift enables you to define methods in class, structure or enumeration In Swift, you use “ +=” Operator to add an item

In objective C, you have to declare variable as NSString and constant as int In objective C, variable is declared as “ and constant as “ The code ends with semi-colon In objective C, you have to choose between NSMutableString and NSString for string to be modified. For classes, you create separate interface (.h) and implementation (.m) files for classes Objective does not allow this In C, you use “addObject”: method of NSMutable array to append a new item to an array