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conditional statements
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‎04-Conditional-Statements/conditionals.js

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/* 1. Get user input using prompt(“Enter your age:”). If user is 18 or older ,
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give feedback:'You are old enough to drive' but if not 18 give another feedback stating to wait for the number of years he needs to turn 18.*/
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let yourAge = prompt("Enter your age: ");
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if (yourAge >= 18){
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console.log(`You're ${yourAge} years old and you're old enough to drive.`);
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}
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else{
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const _age = (18 - yourAge);
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console.log(`You're left with ${_age} years to drive.`);
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}
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/* 2. Compare the values of myAge and yourAge using if … else. Based on the comparison and log
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the result to console stating who is older (me or you). Use prompt(“Enter your age:”) to get the age as input.*/
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let myAge = prompt("Enter my age: ");
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let _yourAge = prompt("Enter your age: ");
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const newAge = (myAge - _yourAge);
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const newAge2 = (_yourAge - myAge);
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if (myAge > _yourAge){
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console.log(`I am ${newAge} years older than you`);
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}
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else{
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console.log(`You are ${newAge2} years older than me`);
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}
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/* 3. If a is greater than b return 'a is greater than b' else 'a is less than b'. Try to implement it in to ways
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using if else
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ternary operator.*/
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let a = prompt("Enter the value for a: ");
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let b = prompt("Enter the value for b: ");
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if (a > b){
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console.log(`${a} is greater than ${b}`);
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}
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else{
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console.log(`${b} is greater than ${a}`);
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}
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// 4. Even numbers are divisible by 2 and the remainder is zero. How do you check, if a number is even or not using JavaScript?
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let num = prompt("Enter a number: ");
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if (num % 2 == 0){
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console.log(`${num} is an even number`);
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}
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else{
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console.log(`${num} is an odd number`);
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}
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/* 5. Write a code which can give grades to students according to theirs scores:
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80-100, A
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70-89, B
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60-69, C
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50-59, D
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0-49, F*/
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let score = prompt("Enter your score: ");
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if (score >= 80 && score <= 100 ){
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console.log(`You achieved grade A`);
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}else if(score >= 70 && score <= 79){
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console.log(`You achieved grade B`);
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}else if(score >= 60 && score <= 69){
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console.log(`You achieved grade C`);
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}else if(score >= 50 && score <= 59){
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console.log(`You achieved grade D`);
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}else{
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console.log(`You achieved grade F`);
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}
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/* 6. Check if the season is Autumn, Winter, Spring or Summer. If the user input is :
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September, October or November, the season is Autumn.
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December, January or February, the season is Winter.
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March, April or May, the season is Spring
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June, July or August, the season is Summer*/
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let month = prompt("Enter month: ");
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if (month == 'September' || month == 'October' || month == 'November'){
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console.log("The season is Autumn");
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}else if (month == 'December' || month == 'January' || month == 'February'){
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console.log("The season is Winter");
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}else if (month == 'March' || month == 'April' || month == 'May'){
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console.log("The season is Spring");
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}else{
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console.log("The season is summer");
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}
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// 7. Check if a day is weekend day or a working day. Your script will take day as an input.
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let day = prompt('What day is today? ');
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switch (day){
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case "Sunday":
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console.log(`${day} is a weekend`);
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break;
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case "Monday":
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console.log(`${day} is a working day`);
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break;
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case "Tuesday":
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console.log(`${day} is a working day`);
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break;
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case "Wednesday":
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console.log(`${day} is a working day`);
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break;
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case "Thursday":
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console.log(`${day} is a working day`);
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break;
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case "Friday":
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console.log(`${day} is a working day`);
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break;
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case "Tuesday":
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console.log(`${day} is a weekend`);
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break;
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}
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// 8. Write a program which tells the number of days in a month.
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let _month = prompt('Enter a month: ')
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switch (_month){
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case 'January':
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console.log(`${_month} has 31 days.`);
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break;
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case 'February':
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console.log(`${_month} has 28/29 days.`);
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break;
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case 'March':
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console.log(`${_month} has 31 days.`);
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break;
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case 'April':
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console.log(`${_month} has 30 days.`);
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break;
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case 'May':
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console.log(`${_month} has 31 days.`);
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break;
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case 'June':
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console.log(`${_month} has 30 days.`);
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break;
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case 'July':
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console.log(`${_month} has 31 days.`);
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break;
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case 'August':
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console.log(`${_month} has 31 days.`);
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break;
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case 'September':
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console.log(`${_month} has 30 days.`);
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break;
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case 'October':
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console.log(`${_month} has 31 days.`);
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break;
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case 'November':
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console.log(`${_month} has 30 days.`);
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break;
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case 'December':
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console.log(`${_month} has 31 days.`);
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break;
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}

‎04-Conditional-Statements/index.htm

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Conditional Statement</title>
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</head>
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<body>
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<h1>Conditional Statement</h1>
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<p>Introduces conditional statements used in JavaScript.</p>
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<ul>
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<li>if</li>
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<li>if else</li>
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<li>switch</li>
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</ul>
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<script src="conditionals.js"></script>
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</body>
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</html>
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