2.WRITE AN ALGORITHM TO CALCULATE AND DISPLAY OF THE FOLLOWING SERIES : 1-2+3-4+5.... UPTO N 

 

 START

STEP 1: Declare the variable n ,c and i as integer.

STEP 2: Initialize n=c=0 and i=1

STEP 3: Input the value of n

STEP 4: If i<=n then Goto Step 5 else Goto Step 7

STEP 5: If  i %2 =0 then c=c-i ,Goto Step 6 else c=c+i , Goto Step 6

STEP 6 : Increment the value of i by 1 and Goto Step 4

STEP 7 : Display the value of c

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