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C Recursion

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program flow  ...

step 1..(11)->if(true) ((11/2=5)*10+11%2=1)  ......>STEP 5.  101*10+1=1011   answer

STEP 2.(11/2=5) ->if(true) (5/2=2)*10+5%2=1)......> STEP 6.  10*10+1=101

STEP 3.  (5/2=2)->if(true)   (2/2=1)*10+2%2=0)  .....>  STEP 7.   1*10+0=10

STEP 4.  (2/2=1)->if(false) return 1 ......now keep on putting the value...

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