Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <style> p.normal {font-weight:normal;} p.light {font-weight:lighter;} p.thick {font-weight:bold;} p.thicker {font-weight:900;} </style> </head> <body> <p class="normal">This is a paragraph.</p> <p class="light">This is a paragraph.</p> <p class="thick">This is a paragraph.</p> <p class="thicker">This is a paragraph.</p> </body> </html>
Result:
W3Schools.com - Try it yourself