java script some basic start
comment - // multiline comment - /* kd write any number of line */ variables var number1 = 12; var number2 = 34; console.log(number1+number2); objects// var marks = { ravi = 26, raju = 34, vijay = 65 } Booleans var a = true; var b = false; . Two types of data type in javascript 1- primitive data type: undefined, null, number,string,boolean,symbol 2- reference data type: Arrays and Object write array : var arr = [1,2,3,4,5] /// check on console - console.log(arr[2]); or console.log(arr); // operator in javascript Athematic operator var a = 100 var b = 10 console.log("The value of a+b is ", a+b); // Assigment Operators var c = b; c += 2; console.log(c) //comparision operatos var x = 10 var y = 20 console.log(x==y) console.log(x>=y) console.log(x<=y) // logical operator console.log(true && true); console.log(false && false); // logical or operator console.log(true || false); console.log(false
