How to add space between words in html?

Answer 1

<p>hello, world</p>

in html what you type is shown exactly the way your typed between the codes.
but If you want include space you can also use

<p>hello,&nbsp;world</p>

here there no space between hello world but when test your code there will space between hello world

Answer 2

in CSS "word-spacing: 3px or you want any spacing ; "