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JavaScript: Construct a pattern, using a nested for loop

JavaScript Conditional Statement and loops: Exercise-10 with Solution

Write a JavaScript program to construct the following pattern, using a nested for loop.

*  
* *  
* * *  
* * * *  
* * * * *

Pictorial Presentation:

JavaScript: Construct a pattern, using a nested for loop

Sample Solution:-

HTML Code:


<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS nested for loop example</title>
</head>
<body>
  
</body>
</html>

JavaScript Code:


var x,y,chr;
for(x=1; x <=6; x++)
{
   for (y=1; y < x; y++)
     {
    chr=chr+("*");        
      }
 console.log(chr);
 chr='';    
}

Flowchart:

Flowchart: JavaScript:- Construct a pattern, using a nested for loop

Live Demo:

See the Pen javascript-conditional-statements-and-loops-exercise-10 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Shorten an array using its length property

A great way of shortening an array is by redefining its length property.

let array = [0, 1, 2, 3, 4, 5, 6, 6, 8, 9]
array.length = 4
// Result: [0, 1, 2, 3]

Important to know though is that this is a destructive way of changing the array. This means you lose all the other values that used to be in the array.

Ref: https://bit.ly/2LBj213