Question

How to check if a number is perfect square in JavaScript

Answer 1

// Perfect squares are: 1(1*1), 4(2*2), 9(3*3), 16(4*4), 25(5*5), 36(6*6)...
  
function is_perfect_square(n) {  
    const sqr = Math.sqrt(n); 
     
    return sqr == Math.floor(sqr); 
}
   
     
if (is_perfect_square(36)) 
    console.log("Yes"); 
else
    console.log("No");          
  
if (is_perfect_square(20)) 
    console.log("Yes"); 
else
    console.log("No");  
     
  
      
    
/*
run:
    
"Yes" 
"No" 
    
*/

 

70+ SQL courses for beginners and professionals