alert("Hello! Wellcome to my website"); var myName = prompt("What's your Name?"); console.log(myName); var num1 = 3; var num2 = 5; console.log(num + num2); //3 + 5

//5 legal variable bellow: var legal; // single word variable var legalName; // double word variable camel casing var legal_name; // double word space variable using underscore var legal$name; // double word variable with $ sign var legalStringName; // 3 words variable

//5 illegal variable bellow: var Illegal; // can't use 1st letter capital in single word var illegalname; // can't use second word 1st letter small // var illegal Name; // shouldn't have space in variable only with underscore var IllegalName; // always 1st letter should be small even using double words // var Illegal name; // shouldn't use grammer of English

console.log(num + num2); // add console.log(num - num2); // subtract console.log(num * num2); // multiple console.log(num / num2); // division

//Modulus (%) Operator var num = +prompt("Enter a number I will check it is even or odd"); if (num % 2 == 0) { console.log(num + " is even"); } else { console.log(num + " is odd"); }

// Pre/Post Increment & Decrement Operators console.log(++num); // pre increment = It will add 1 before display and display added value console.log(num--); // post decrement = It will subtract 1 after display console.log(num++); // post increment = It will increase 1 after display console.log(--num); // pre decrement = It will subtract 1 before display

// Concatenating Text Strings var fName = "Prem"; var eName = "Kumar"; console.log(fName + " " + eName); // This will add Umer and Soomro display will be Umer Soomro

// Prompts var color = prompt("Your favorite color?"); console.log("You favorite color is " + color);

// if Statements if (num == 10) { console.log("true"); }

// Comparison Operators if (5 == "5") { // == doesn't check data type often === check data type console.log("true"); } else if (5 === "5") { //=== check data type console.log("true"); } else { console.log("false"); }

/*Ask the user for marks and show grade based on:

80–100 → “A Grade” 60–79 → “B Grade” 40–59 → “C Grade” Below 40 → “Fail”*/

var percent = +prompt("WHat is your percentage"); if (percent >= 80) { console.log("A"); } if (percent >= 60) { console.log("B"); } if (percent >= 40) { console.log("C"); } else { console.log("Fail"); }

// Bonus quiz var one = +prompt("Enter First number"); var operator = prompt("Enter an operator (+, -, , /):"); var two = +prompt("Enter second number"); var result; if (operator === "+") { result = one + two; } else if (operator === "-") { result = one - two; } else if (operator === "") { result = one * two; } else if (operator === "/") { result = one / two; } else { result = "Invalid operator"; } console.log("Result = ", result);