Square Star Pattern in Javascript Demo | Stackblitz

CODE:

// Import stylesheets

let n = 5; // row or column count

// defining an empty string

let string = "";

for(let i = 0; i < n; i++) { // external loop

  for(let j = 0; j < n; j++) { // internal loop

    string += "*";

  }

  // newline after each row

  string += "\n";

}

// printing the string

console.log(string);

DEMO

   

Square Star Pattern in Javascript  Demo

Scaler Topics | JavaScript for Beginners - Getting Started - 1

 Q1 -- What is JavaScript?

 Ans--- JavaScript is a scripting language used to make the website interactive

Q2 -- What is Node.js?

 Ans---   It is a JavaScript runtime and open source , cross-platform environment for server development built on chrome’s V8 Engine

Q3 -- Which HTML tag links a JS file with an HTML file?

Ans---    script

Q4  -- What will be the output of the following code?

let a=3000;
console.log("I love you", a,"!");

Ans---I love you 3000 !

Q5 --  Which of the following scoping type does JavaScript use?

Ans--- Lexical

What is Node.js?

 It is a JavaScript runtime and open source , cross-platform environment for server development built on chrome’s V8 Engine

What is JavaScript?

 JavaScript is a scripting language used to make the website interactive

How to reverse an array in Javascript?

 

Method 1

<script>

    let numbers_array = [11, 22, 33, 54, 55];

     

    console.log("Original Array: ");

    console.log(numbers_array);

     

    numbers_array.reverse();

     

    console.log("Reversed Array: ");

    console.log(numbers_array);

</script>




    Output:

Original Array: 
[ 11, 22, 33, 44, 55 ]
Reversed Array: 
[ 55, 44, 33, 22, 11 ]

Method 2

 let original_array = [11, 22, 33, 44];
 
 let reversed_array = [];
 
 console.log("Original Array: ");
 console.log(original_array);
 
  for (let i = original_array.length - 1; i >= 0; i--) {
        reversed_array.push(original_array[i]);
  }
 
  console.log("Reversed Array: ");
  console.log(reversed_array);

    Output:
Original Array: 
[ 11, 22, 33, 44, 55 ]
Reversed Array: 
[ 55, 44, 33, 22, 11 ]
Method 3
let original_array = [11, 22, 33, 44, 55, 66];
 
let reversed_array = [];
 
console.log("Original Array: ");
console.log(original_array);
 
original_array.forEach((element) => {
      reversed_array.unshift(element);
});
 
console.log("Reversed Array: ");
console.log(reversed_array);
Original Array: 
[ 11, 22, 33, 44, 55,66 ]
Reversed Array: 
[66, 55, 44, 33, 22, 11 ]

WHAT IS AN HTML ELEMENT ?

 An HTML elements is defined by a star tag , some content , and an end tag .

 < tagname > content goes here ..... < /tagname >

The HTML elements is everything from the start tag to the end tag : 

 < h1 > first heading < h 1>

 < p > my first paragraph < /p >

START  TAG         ELEMENT CONTENT       END TAG

< h1 >                        my first heading                     </h1>

<p>                              my first paragraph                 </p>

<br>                            none                                        none

                         

                 

What Is HTML?

 HTML is Hyper Text Markup Language.

HTML tag,

HTML,

Body,

Title

How to check every two minute in javascript Function Using set Interval

 

setInterval(function(){

alert("Kindly save your details to avoid data lose");

}, 2000);

How to check DOB less then 18 in Javascript

Javascript Function :

 var currDate =01/03/2023

var date_birth = 04/03/1994

function isLessThan18(currDate, date_birth)

{

var currday=parseInt(currDate.substring(0,2),10);

var currMnth=parseInt(currDate.substring(3,5),10);

var currYear=parseInt(currDate.substring(6,10),10);

var dobDay=parseInt(date_birth.substring(0,2),10);

var dobMon=parseInt(date_birth.substring(3,5),10);

var dobYear=parseInt(date_birth.substring(6,10),10);

if(currYear-dobYear<18)

{

return true;

}

else if(currYear-dobYear>18)

{

return false;

}

else if(currYear-dobYear==18)

{

if(currMnth>dobMon)

{

return false;

}

else if(currMnth<dobMon)

{

return true;

}

else if(currMnth==dobMon)

{

if(currday<dobDay)

{

return true;

}

else if(currday>=dobDay)

{

return false;

}

}

}

}

How to clear session in PHP Simple way

 You can clear _SESSION 

<?php

        session_start(); 

          session_destroy();

        $_SESSION = [];

echo '<h1>You have been successfully remove session</h1>';

?>