Overview of C Programming Language
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Overview of C Programming Language

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Questions and Answers

What is the purpose of comments in a program?

  • They execute actions within the program
  • They improve the readability of the program (correct)
  • They allow the program to run more efficiently
  • They replace the need for variable declarations

    • Which of the following statements about the main() function is true?

  • The main() function can only have local variables
  • The program execution starts with the main() function (correct)
  • The main() function should contain no parameters
  • The main() function cannot return any value

    • How are single line comments written in C?

  • Using // comment (correct)
  • Using # comment
  • Using /* comment */
  • Using -- comment

    • What is a correct example of a pre-processor directive in C?

    <p>#include&lt;stdio.h&gt;</p> Signup and view all the answers

    What section of a C program consists of user-defined functions?

    <p>Subroutine section</p> Signup and view all the answers

    Which of the following statements about the C programming language is true?

    <p>C is a procedure-oriented programming language.</p> Signup and view all the answers

    What is NOT a feature of the C programming language?

    <p>Strictly interpreted language</p> Signup and view all the answers

    Which of the following is an example of a keyword in C?

    <p>extern</p> Signup and view all the answers

    Which of the following names is a valid identifier according to the naming rules?

    <p>_variable</p> Signup and view all the answers

    What character is used to terminate every statement in C?

    <p>;</p> Signup and view all the answers

    What is a requirement for variable names in C programming?

    <p>Cannot start with a digit</p> Signup and view all the answers

    Which of the following options is NOT considered a token in C programming?

    <p>Numbers</p> Signup and view all the answers

    Which of the following is NOT an example of a constant in C?

    <p>int max = 100</p> Signup and view all the answers

    What type of characters are included in the character set of C?

    <p>Lower case alphabets, upper case alphabets, digits and other characters</p> Signup and view all the answers

    What type of operator operates on two operands?

    <p>Binary Operator</p> Signup and view all the answers

    Which of the following symbols is used for pre-processor directives in C?

    <h1></h1> Signup and view all the answers

    In the general structure of a C program, what does '#include <stdio.h>' signify?

    <p>Link section</p> Signup and view all the answers

    Which of the following describes identifiers in C programming?

    <p>They refer to names given by the programmer to elements.</p> Signup and view all the answers

    Which of the following statements about identifiers in C is incorrect?

    <p>Identifiers can begin with any character</p> Signup and view all the answers

    What can you expect the compiler to do if you try to change the value of a constant defined with #define?

    <p>Compiler will throw an error</p> Signup and view all the answers

    Which part of the C program structure indicates the beginning of the program execution?

    <p>int main()</p> Signup and view all the answers

    Study Notes

    Overview of C Programming Language

    • High-level language
    • Procedure-oriented language
    • Developed in 1972 by Dennis Ritchie at Bell Labs
    • Robust programming language, rich set of operators, and built-in functions
    • Middle-level language, suitable for system and application programs
    • Portable code, runs on different machines
    • Structured code, broken down into parts (functions)
    • Extensible, allows for adding subprograms as needed

    Character Set

    • Lowercase letters (a-z)
    • Uppercase letters (A-Z)
    • Digits (0-9)
    • Special characters (+ - * & $ ! @ # % { } [ ] : ; , ! etc.)
    • White spaces (space, newline, tab)

    C Tokens

    • Smallest unit in a C program
    • Classified into Keywords, Special Symbols, Identifiers, Variables, Constants, and Operators

    Keywords

    • Reserved words with predefined meaning
    • 32 keywords in C

    Special Symbols

    • Symbols with special meanings (e.g., ;, =, {, }, etc.)

    Identifiers

    • Names given by the programmer to variables, constants, functions, etc.
    • Can contain letters, digits, and underscore (_)
    • Cannot start with a digit
    • Case-sensitive (e.g., myVariable and myvariable are different)
    • Keywords cannot be used as identifiers

    Variables

    • Quantities that change during program execution
    • Storage areas for manipulation
    • Cannot start with a digit
    • Case-sensitive

    Constants

    • Quantities that do not change
    • Can be defined using the #define preprocessor directive (symbolic constants)

    Operators

    • Symbols used to perform operations
    • Classified by the number of operands they operate upon (e.g., unary, binary, ternary)

    General Structure of a C Program

    • Documentation section
    • Link section (includes headers)
    • Definition section (preprocessor directives, constants)
    • Global section (global variables)
    • Main function section
    • Subroutine section (user-defined functions)
    • Comments are used to explain the code (single-line // and multi-line /* */)

    Basic Structure of a C Program

    • Includes header files
    • int main() function
    • Curly braces {} enclose program statements
    • return 0; statement indicates successful program execution.

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    Related Documents

    Programming in C - Unit 1 PDF

    Description

    This quiz covers the fundamental concepts of the C programming language, including its history, character set, and types of tokens. It also delves into the importance of keywords, special symbols, and identifiers used in C programming. This is essential for understanding how to write and structure C code effectively.

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