Check out example codes for "font stack css". It will help you in understanding the concepts better.

Code Example 1

/* Answer to: "font stack css" */

  A font stack is a list of fonts in the CSS font-family
  declaration. The fonts are listed in order of preference that
  you would like them to appear in case of a problem, such as a
  font not loading.

  Check this complete collection of web safe CSS font stacks:

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