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Example 1 :

study of the factorial function.

The user wrote a recursive program, calculating the factorial of an integer number in the editor with syntactic coloration. Next, he begins execution of the program step by step. He sees global variables and their values. He sees too the parameters and the local variables of the called function in the window showing the execution stack. Recursive calls of the factorial function can be seen, showing stacking (to the bottom) of the successive frames of each call. Each frame has a different background color,in order to see them better. The value, with the yellow background color, has just been changed by the last executed instruction. At last, evaluation stack can be seen, showing the values stacked during an evaluation of an expression.