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Recursion

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$code(0)\rightarrow ME$ will print $0$ times

$code(1)\rightarrow{\color{Blue} {i=1}}$${\color{Purple} {----------\rightarrow }{code(0)}}$

                                   ${\color{Purple} {----------\rightarrow }{code(-1)}}$

                                   ${\color{Purple} {----------\rightarrow }{ME}}$

 

 

                            ${\color{Blue} {i=2}}$${\color{Purple} {----------\rightarrow }{code(-1)}}$

                                   ${\color{Purple} {----------\rightarrow }{code(-2)}}$

                                   ${\color{Purple} {----------\rightarrow }{ME}}$

 

So, for $code(1)$ $ME$ will print $2$ times

 

 

$code(2)\rightarrow{\color{Blue} {i=1}}$${\color{Purple} {----------\rightarrow }{code(1)}}$$\rightarrow$$ME$ prints $2$ times

                                   ${\color{Purple} {----------\rightarrow }{code(0)}}$

                                   ${\color{Purple} {----------\rightarrow }{ME}}$

 

 

                            ${\color{Blue} {i=2}}$${\color{Purple} {----------\rightarrow }{code(0)}}$

                                   ${\color{Purple} {----------\rightarrow }{code(-1)}}$

                                   ${\color{Purple} {----------\rightarrow }{ME}}$

 

So, for $code(2)$ $ME$ will print $4$ times

 

Similarly $code(3)$ will print $ME$ $10$ times

 

and $Code(4)$ will print $ME$ $22$ times
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