javascript/j1.html at main · ReemHasanA/javascript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>

 // 1-  Declare a variable called "name" and assign it the value "John".
 /******* Start Your Code *********/
  var name="John";


/******* End Your Code ********* */


// 2- Declare a constant called "PI" and assign it the value 3.14.
/******* Start Your Code *********/
 const PI= 3.14;


/******* End Your Code ********* */

// 3- Declare a variable called "age" and assign it your age.
/******* Start Your Code *********/
 var age= 25;


/******* End Your Code ********* */

// 4- Declare a variable called "isStudent" and assign it a boolean value.
/******* Start Your Code *********/
var isStudent= true;


/******* End Your Code ********* */

// 5- Create a string variable called "message" and assign it a message of your choice.
/******* Start Your Code *********/
 var message=" hi";


/******* End Your Code ********* */

// 6- Use template literals to create a string that includes the variables "name" and "age".
/******* Start Your Code *********/

console.log(`my name is ${name},
my age${age}`)

/******* End Your Code ********* */

// 7- Use the string method "length" to find the length of the string "message".
/******* Start Your Code *********/


let length = message.length;

/******* End Your Code ********* */

// 8- Use the string method "toUpperCase()" to convert the string "message" to uppercase.
/******* Start Your Code *********/
let result = message.toUpperCase();
console.log(result)

/******* End Your Code ********* */

// 9- Use the string method "toLowerCase()" to convert the string "message" to lowercase.
/******* Start Your Code *********/

let result2 = message.toLowerCase();

/******* End Your Code ********* */

// 10- Use the string method "indexOf()" to find the position of the word "JavaScript" in the string "I love learning JavaScript".
/******* Start Your Code *********/
 var msg="I love learning JavaScript"
 let result3 = msg.indexOf("JavaScript");
 console.log(result3)

/******* End Your Code ********* */

// 11- Use the string method "slice()" to extract a portion of the string "message".
/******* Start Your Code *********/
result=msg.slice(0,5)
console.log(result)


/******* End Your Code ********* */

// 12- Declare a variable called "num1" and assign it a number.
/******* Start Your Code *********/
 var num1=233


/******* End Your Code ********* */

// 13- Declare a variable called "num2" and assign it another number.
/******* Start Your Code *********/
let num2=123


/******* End Your Code ********* */

// 14- Use the arithmetic operator "+" to add num1 and num2.
/******* Start Your Code *********/
console.log(num1+num2)


/******* End Your Code ********* */

// 15- Use the arithmetic operator "-" to subtract num1 from num2.
/******* Start Your Code *********/
console.log(num2-num1)

// to rverse num integer we can do this without function or loop
num1-=num2
num2+=num1
num1-=num2
console.log(num1,num2)
/******* End Your Code ********* */
</script>
</body>
</html>