C Programming
String concatenation means -

Combining two strings.
Partitioning the string into two strings.
Extracting a substring out of a string.
Comparing the two strings to define the larger one.
Merging two strings.

ANSWER DOWNLOAD EXAMIANS APP

C Programming
A preprocessor command

need not start on the first column
has # as the first character
need not start on a new line
comes before the first executable statement

ANSWER DOWNLOAD EXAMIANS APP