Question

How to calculate square root (or floor square if not perfect square) of an integer in JavaScript

Answer 1

function sqrt_(n) { 
    if (n === 0 || n === 1) 
        return n; 
   
    var i = 1; 
    var sq = 1; 
     
    while (sq <= n) { 
      i++; 
      sq = i * i; 
    } 
    return i - 1; 
} 
   
document.write(sqrt_(9) + "<br />");
document.write(sqrt_(5) + "<br />");
document.write(sqrt_(26) + "<br />");
document.write(sqrt_(16) + "<br />");

    
  
/*
run:
  
3
2
5
4
  
*/

 

70+ SQL courses for beginners and professionals