Complex sentence: In programming languages, such as C, C++, and Microsoft Visual C Sharp, all subroutines are called "functions", not to be confused with "mathematical functions" or "functional programming" which are different concepts.
Split into simpler sentences: In programming languages, such as C, C++, and Microsoft Visual C Sharp, all subroutines are called "functions". Not to be confused with "mathematical functions" or "functional programming" which are different concepts.