In the below program, the function will return a string indicating that that object is not a number using TypeScript nullish coalescing which will provide a default value for that variable if it is either null or undefined. <\/p>\n
\r\nfunction num(obj : any) : number {\r\n return obj?? "Not a number"\r\n}\r\n\r\nconsole.log(num(undefined)) \/* Not a number *\/\r\nconsole.log(num(3)) \/* 3 *\/\r\n<\/pre>\nThe ?? is nullish coalescing operator which will provide the default value on the left hand side of that operator.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the below program, the function will return a string indicating that that object is not a number using TypeScript nullish coalescing which will provide a default value for that variable if it is either null or undefined. function num(obj : any) : number { return obj?? "Not a number" } console.log(num(undefined)) \/* Not a…<\/p>\n