C Programming
Use of functions

Makes the debugging task easier.
Helps to avoid repeating a set of statements many times.
All of these
Helps to avoid repeated programming across programs.
Enhances the logical clarity of the program.

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C Programming
String concatenation means -

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

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