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anup-sysanup-sys
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‎Basics/DatatypesConv.js‎

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@@ -81,3 +81,59 @@ console.log(Boolean(0)); // false
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console.log(Boolean("")); // false
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console.log(Boolean("Hello")); // true
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console.log(Boolean(123)); // true
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let value = 3;
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let negvalue = -3;
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console.log(negvalue);
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let str3 = "Anup";
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let str4 = " Singh";
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str5 = str3+str4;
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console.log(str5);
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console.log("1"+1); //11
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console.log(1+"1"); //11
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console.log("2"+7);
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console.log("56"+"56"+8+9);
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console.log("2"+"5");
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console.log(6*8+4);
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console.log(+true); //1
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//console.log(++true) //error
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console.log(+"") //0
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let gameCounter = 100;
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gameCounter++; //101
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gameCounter--; //100
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console.log(gameCounter);
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let Counter = 25;
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++Counter; //26
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--Counter; //25
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console.log(Counter);
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console.log(1<2) //true
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console.log(1>2) //false
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console.log(1==1) //true
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console.log(1<+2) //true
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console.log(1==2) //false
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console.log(2 !=1) //true
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console.log(1 != 1) //false
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console.log("1" > 1) //false
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console.log("1" == 1) //true
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console.log(null>0) //false
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console.log(null<0) //false
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console.log(null>=0) //true
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console.log(undefined == 0); //false
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console.log(undefined>0) //false
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console.log(undefined<0) //false
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console.log("2" === 2) //false
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console.log(2===2) //true

‎ControlStatement/ConditionalStatement.js‎

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//if, else if, else, switch
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//Runs a block of code if a condition is true.
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//Used for multiple conditions.
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//Runs one block if true, another if false.
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//Used when there are many conditions on a single variable.
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//Used for decision making
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let age = 18;
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if(age>=18){
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console.log("You can Vote");
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}
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let age1 = 14;
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if(age1>=18){
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console.log("You Can Vote");
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}else{
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console.log("You can not Vote");
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}
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//let marks = 85;
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//if(marks>=85){
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//console.log("Grade: "+A)
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//}else if (marks>=75){
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//console.log("Grade: "+B)
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//}else(marks>=65){ not add any value in else statement
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//console.log("Grade: "+C)
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//}
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let marks = 85;
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if (marks >= 85) {
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console.log("Grade: " + "A");
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} else if (marks >= 75) {
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console.log("Grade: " + "B");
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} else if (marks >= 65) {
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console.log("Grade: " + "C");
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} else {
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console.log("Grade: " + "D");
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}
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let day = 3;
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switch (day) {
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case 1:
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console.log("Monday");
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break;
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case 2:
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console.log("Tuesday");
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break;
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case 3:
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console.log("Wednesday");
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break;
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default:
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console.log("Invalid day");
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}
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let subject = "english";
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switch(day){
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case 1 :
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console.log("Math");
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break;
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case 2 :
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console.log("Physics");
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break;
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case 3 :
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console.log("English");
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break;
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default:
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console.log("Invalid Subject");
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}
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//Check if a Number is Positive, Negative, or Zero
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let num = -5;
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if (num > 0) {
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console.log("Positive number");
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} else if (num < 0) {
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console.log("Negative number");
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} else {
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console.log("Zero");
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}
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let number = 6;
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if(number>0){
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console.log("Positive number");
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}else if (number < 0) {
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console.log("Negative number");
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}else {
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console.log("Zero");
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}
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//Check if a Number is Even or Odd
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let num1 = 7;
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if (num1 % 2 === 0) {
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console.log("Even number");
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} else {
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console.log("Odd number");
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}
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//Find the Largest of Three Number
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let a = 15, b = 25, c = 20;
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if (a > b && a > c) {
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console.log("A is the largest");
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} else if (b > a && b > c) {
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console.log("B is the largest");
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} else {
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console.log("C is the largest");
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}
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//Leap Year Checker
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let year = 2025;
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if ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0) {
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console.log(year + " is a Leap Year");
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} else {
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console.log(year + " is not a Leap Year");
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}
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//Check if a Character is a Vowel or Consonant
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let ch = 'e';
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if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
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ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') {
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console.log("Vowel");
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} else {
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console.log("Consonant");
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}
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//Electricity Bill Calculator
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let units = 180;
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let bill = 0;
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if (units <= 100) {
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bill = units * 5;
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} else if (units <= 200) {
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bill = (100 * 5) + ((units - 100) * 7);
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} else {
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bill = (100 * 5) + (100 * 7) + ((units - 200) * 10);
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}
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console.log("Total Bill: ₹" + bill);
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//Traffic Light Simulator
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let signal = "yellow";
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if (signal === "red") {
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console.log("Stop");
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} else if (signal === "yellow") {
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console.log("Get Ready");
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} else if (signal === "green") {
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console.log("Go");
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} else {
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console.log("Invalid signal color");
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}
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//Simple Calculator
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let number1 = 20;
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let number2 = 5;
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let operator = "*";
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if (operator === "+") {
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console.log(number1 + number2);
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} else if (operator === "-") {
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console.log(number1 - number2);
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} else if (operator === "*") {
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console.log(number1 * number2);
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} else if (operator === "/") {
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console.log(number1 / number2);
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} else {
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console.log("Invalid operator");
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}

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