4. What is Compiler ?

A compiler is a computer program that translates computer code written in one programming language (the source language) into another programming language (the target language). The name compiler is primarily used for programs that translate source codefrom a high-level programming language to a lower level
language (e.g., assembly language, object code, or machine code) to create an executable program .

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12. Library Functions of C Programming

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13. Control Strings in C Programming

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3. What is programming language ?

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C is a high level, most powerful programming language. It was developed by Dennis Ritchie at AT & T's Bell Laboratories of USA during the 1970's. Basic features of C (1) Machine independence : C programs normally run on many different computers without alteration, provided the appropriate library functions and header files are utilized. (2) Structured programming : C programs are written systematically with the feature of structured programming concept. (3) Flexibility : C has flexible features to write programs for numerical, commercial, and graphical applications. (4) Integrity : This refers to the accuracy of the calculations. C is one of the most popular highly integrated programming languages. (5) Efficiency : Efficiency is concerned with execution speed and memory utilization. Normally programs written in C are efficient and fast.
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17. Constants/Literals in C programming

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