LEARN                                                                       
                                                                                  
      Three      ideas     to  unlock                                             
                                                                                  
                                                                                  
                                                                                  
                                                                                  
               Define a function once, then call it whenever you need those instructions. Functions
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               make programs easier to read and change.                           
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
               A parameter is a variable that receives information when the function is called. The
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               value supplied in a call is called an argument.                    
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
               A function can return a result. Returning is different from printing: the program can
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               store or calculate with a returned value.                          
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                                                                  
                                        Pause and explain each idea in your own words.
                                                                                  
                                                                                  
                                                                                  
                                                                                  
      Functions: Make New Commands                                        62
