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Variables

-                      v3
+                      v4
 . In the output terminal window, observe that the number 12 is output.
+Our example program creates 3 variables (boxes) named a, b, c.  They are all integer variables (they can only hold integer numbers).  The program then places the number 3 in variable a, the number 4 in variable b, and the product of whatever is in a and b into variable c.  Finally, the program prints whatever value is in variable c.
+=== Understanding the program ===
+Our example program:
+* Creates 3 variables (boxes) named a, b, c.  They are all integer variables (they can only hold integer numbers).
+* The program then places the number 3 in variable a, the number 4 in variable b, and the product of whatever is in a and b into variable c.
+* Finally, the program prints whatever value is in variable c.
 === Extra Credit ===
 Change the program, adding more variables, changing numbers and formulas and run it again.
+Change the program: adding more variables, change numbers and formulas and run it again.