JS - Note
Variable- typeof- typeof undefined- is undefined let car; then = typeof car is undefined Equal and Strict equal- let objOne = { name: "Smith" }; let objTwo = { name: "Smith" }; console.log(objOne === objTwo); // output false , also false in equal operator (as the onjects are stored in different locations) null==undefined-> true String Interpolation calculation inside template-string( ${}) - example- ${firstNumber * secondNumber} Undefined & Null- let x; console.log(x) - gives Undefined const x; console.log(x) - gives Syntax Error Null and Undefined difference- When a variable is undefined , it means it has been given no value to hold. Whereas, when a variable is null , it means the variable has a value, the value null . OBJECT - to get keys- Object.keys(objName)- returns array to get values - Object.values(objName)- returns array to get both as array format- Object.entries(...