A string constant consists of zero or more character enclosed in quotation marks.
Several string constants are given below.
“Welcome to C Programming”
There is a difference between the constant ‘A’ and “A” in C, the first ‘A’ is a
character constant while the second “A” is string constant. The notation ‘A’ is
a constant occupying a single byte containing the ASCII code of the character A.
The notation “A” on the other hand ,is a constant that occupies two
bytes one for ASCII code of A and another for the null character with the value
0,that terminates all the string.