Multiple Styles Will Cascade Into One

Style sheets allow style information to be specified in many ways. Styles can be specified inside a single HTML element, inside the  element of an HTML page, or in an external CSS file. Even multiple external style sheets can be referenced inside a single HTML document.  
  
 Cascading Order
  
 What style will be used when there is more than one style specified for an HTML element?
   
Generally speaking we can say that all the styles will "cascade" into a new "virtual" style sheet by the following rules, where number four has the highest priority: 
 
Browser default
External style sheet
Internal style sheet (inside the  tag)
Inline style (inside an HTML element)
 
So, an inline style (inside an HTML element) has the highest priority, which means that it will override a style declared inside the  tag, in an external style sheet, or in a browser (a default value).