What are the different file extensions involved when programming in C?

C Programming Language > Fundamentals of C Language > Important points about C

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Source codes in C are saved with .C file extension. Header files or library files have the .H file extension. Every time a program source code is successfully compiled, it creates an .OBJ object file, and an executable .EXE file.

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454. What are reserved words?

Answer: Reserved words are words that are part of the standard C language library. This means that reserved words have special meaning and therefore cannot be used for purposes other than what it is originally intended for. Examples of reserved words are int, void, and return.

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455. Not all reserved words are written in lowercase. TRUE or FALSE?

Answer: FALSE. All reserved words must be written in lowercase; otherwise the C compiler would interpret this as unidentified and invalid

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456. What is the difference between the expression "++a" and "a++"?

Answer: In the first expression, the increment would happen first on variable a, and the resulting value will be the one to be used. This is also known as a prefix increment. In the second expression, the current value of variable a would the one to be used in an operation, before the value of a itself is incremented. This is also known as postfix increment.

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457. What is an endless loop?

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458. What is wrong with this program statement? void = 10;

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459. Is this program statement valid? INT = 10.50;

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460. What are actual arguments?

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461. What are run-time errors?

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462. What is the difference between functions abs() and fabs()?

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