while loop

Question

what does following code mean if j=0 and a and b are two character pointers to two strings:
while(a[j]&&b[j])

Comments

It means that the loop is iterating over two arrays, that are supposed to have at least one, zero element each

While iterating over the arrays, as the control reaches on the point where both elements are 0,

Loop will exit

Answer 1

Since the value of j is 0, therefore the character pointer to string entails the first element of both the strings. And until their value is true. 

I hope the description helps u. :). For more information visit the link mentioned below. :)

http://stackoverflow.com/questions/15168771/pointer-to-a-string-in-c

Answer 2

what does following code mean if j=0 and a and b are two character pointers to two strings:
while(a[j]&&b[j])

if j=0

while(a[0] && b[0])

it means the character at location a[0] ans b[0] would be check by its ASCII value if both of them are positiove so there will be while loop run throghout the condition is true.

Comments

It is better to say "character code" and not ASCII value as ASCII value is just one of the possible character code in C. For exams like GATE, no question will be asked where one needs to know ASCII code.

Answer 3

It means that the loop is iterating over two arrays, that are supposed to have at least one, zero element each

While iterating over the arrays, as the control reaches on the point where both elements are 0,

Loop will exit