Using bitcount command in redis

Question

I set a key to 0 and get the bitcount using the below command in redis

 set result 0
 bitcount result

I get the output to be 2 instead of 0. When i set the result to any other number and print the bitcount I get the correct number of set bits with the addition of 2. Why is 2 by default added to the bitcount's result?

Answer 1

因为result包含字符"0" ，它是十进制的整数48 ，二进制的110000 。