Adding bold text to variable

Question

I am just beginning with JavaScript and what I am trying to achieve now is to add bold style to a variable result. The code that I am refering to is the following:

if(isNumeric(n)) { 
    document.write("The square root of " + n + " is " + answer); 
} 
else { 
    alert('This is not a number!');
}

I want to make the variable answer to appear in bold and the result to look like this:

Example: The square root of 4 is 2

Thank you all in advance!

Answer 1

It's just a matter of adding some HTML ?

if(isNumeric(n)) { 
    document.write("The square root of " + n + " is <strong>" + answer + "</strong>"); 
} else { 
    alert('This is not a number!');
}

This is fine for testing, but in production you wouldn't really use document.write , and preferably you'd use an external stylesheet and a wrapper element to make parts of the text bold.