What is the sum of first 10000 numbers in the series -1,+1,-1,+1,-1.......??
Choose the correct choice from the following options:
A) 0
B) 1
C) 2
D) 3
E) 4
-1+1= 
<gadget id="calculator">-1+1</gadget>
<output>0</output>
0   and for 10000 numbers it will form 5000 pairs   so 5000*0= 
<gadget id="calculator">5000*0</gadget>
<output>0</output>
0   0NSWER:0
<result>A</result>
What is the sum of first 10000 numbers in the series -1,+1,-1,+1,-1.......??