kk
i've understood that its been adding 1+23+456 .. The value given only in 'a'
But my question is why is it not taking b and c into consideration??
Like. when does it take b and c also ??

Then wht is the use of giving b and c ?
I can declare anyyyyyy number of variables (b,c,d,e,.......) but it adds up only 'a' ?