Function keys are a set of keys found on the top row of the keyboard that perform special jobs or assignments.
 

Explanation:

Each function key on the keyboard is labeled with the letter "F" followed by a number (example: "F1, F2, F3, etc.). The F1 key is usually a "Help" key.  The special jobs of the function keys are usually determined by the software program you are using.
 
 

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