C PROGRAMMING - OUR FIRST PROGRAM

Duration: 14 min

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Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Paper-1 & 2 | Basic Numeracy: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Mensuration and Geometry, Age Problems, Arithmetic, Statistics, Probability, Profit and Loss, Simple Interest and Compound Interest, Partnership, Speed Mathematics and Basic Mathematics, Algebra, Powers and Exponents (Surds and Indices), Time and Work, Pipe and Cistern, RSSB Specific Videos - Basic Numeracy
  3. Paper-1 & 2 | Data Interpretation: Data Interpretation
  4. Paper-1 & 2 | General Mental Ability: Mental Ability, RSSB Specific Videos - Mental Ability
  5. Paper-1 & 2 | Logical Reasoning and Analytical Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Analogy, Ranking, Order and Sequence, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Data Arrangement, Logical Sequence Of Words, Crypt Arithmetic
  6. Paper-1 & 2 | Decision Making and Problem Solving: Selection Decision Table (Decision Making)
  7. Paper-1 | General Science: Physics, Biology, Chemistry, RSSB Specific Videos
  8. Paper-1 | General Awareness: State Wise GK, GK- Current Affairs
  9. Paper - 2 | Digital Logic Systems: Digital Systems & Boolean Basics, Logic Gates & Hardware, Combinational Circuit, Sequential Circuits
  10. Paper-2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Calculus, Relational Algebra, SQL, NoSQL
  11. Paper-2 | Data Structures & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Algorithm Analysis, Sorting Algorithms, Intro to Compilers, Hashing
  12. Paper 2 | Data Communication and Network Security: Introduction to CN, Data Communication, Data Link Layer - Ethernet, DLL: Error Control, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Application Layer, Hardware basics, Network Security, Ethical Hacking
  13. Paper-2 | Operating Systems: Introduction to OS, Process Management, Memory Management, File Management, Deadlock
  14. Paper-2 | Computer Organization and Architecture: Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Programming the Basic Computer, Number System, Number Representation
  15. Paper 2 | System Analysis and Design: Fundamentals of Systems and Information Systems, Fundamentals of Software Engineering, SDLC and Development Approaches, Software Documentation and Software Requirements Specification (SRS), SDD and Quality Assurance, Security, Risk Management & Maintenance, Software Testing
  16. Paper-2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Paper 2 | OOPS , C++ , JAVA: Language Design, OOPS with C++, Java, .Net Programming, Java Fundamentals
  18. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  19. Emerging Trends and AI: Emerging Tech Trends, Artificial Intelligence
  20. Paper-2 | Data Processing (Ms-Office): MS Office Applications
  21. Paper-2 | Internet and Web Technologies: HTML Basics, CSS, XML, JavaScript-Basics, Internet Fundamentals, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, Terms & Abbreviations, Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing
  22. Paper 2 | Pedagogy: Child Development, Theories, Concept of Pedagogy, Inclusive Education, Experiential Pedagogy, Assessment & Evaluation, Psychology, Curriculum Framework & Reforms, National Education Policy (NEP) 2020
  23. Live Classes: RSSB Live Sessions
  24. Paper 1 - Full Mock Tests:
  25. Paper 2 - Full Mock Tests:
  26. BCI Previous Year Papers:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture introduces writing a first C program by calculating simple interest. It begins with an OnlineGDB editor showing the formula si = p * n * r / 100 and output 255.000000, then explains program structure using statements ending with semicolons in a free-form language. The session covers comment syntax using /* and */, noting comments cannot be nested but can span multiple lines. It defines main() as a collective name for statements and introduces printf() with format specifiers %f, %d, and %c. Finally, it demonstrates scanf() requiring the address-of operator & before variables to store user input.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title slide reading 'Break' and subtitle '6-First program', then transitions to an OnlineGDB code editor. The instructor introduces the first C program for calculating simple interest, displaying the formula si = p * n * r / 100. The program output shows a value of 255.000000 at the bottom of the compiler window, establishing practical context before detailed variable explanations.

  2. 2:00 – 5:00 02:00-05:00

    The lecture explains basic C program rules, emphasizing that statements are entered in lowercase and must end with a semicolon as a statement terminator. The instructor highlights that C is a free-form language with no specific rules for statement position, using the simple interest code as a visual example. Red dashes highlight individual statements to illustrate sequential execution order and the concept that each instruction is separate.

  3. 5:00 – 10:00 05:00-10:00

    The session covers comment rules in C, showing that comments must be enclosed within /* and */ and can appear before, after, or within statements. The instructor demonstrates that comments cannot be nested but can span multiple lines as multi-line comments, using 'This is a jazzy comment' as an example. A slide then states that main() is a collective name given to a set of statements, with 'Void main()' circled in red for emphasis.

  4. 10:00 – 13:35 10:00-13:35

    The lecture explains that C has no built-in output instruction, introducing printf() with format specifiers: %f for real values, %d for integers, and %c for characters. Examples show printf("%d %d %f %f", p, n, r, si) with notes that \n is called newline. The final section demonstrates scanf("%d %d %f", &p, &n, &r), emphasizing that the ampersand (&) before variables is mandatory as it provides the memory location where user-supplied values are stored.

The lecture progresses from practical program execution to theoretical syntax rules. It starts with a working simple interest calculator in OnlineGDB, then systematically breaks down C language fundamentals: statement structure with semicolon terminators, free-form formatting flexibility, comment syntax and nesting restrictions, the main() function definition, output via printf() with format specifiers, and input via scanf() requiring address-of operators. The simple interest example (p=1000, n=3, r=8.5) serves as a consistent thread throughout, making abstract syntax rules concrete through repeated reference to the same code. The teaching approach prioritizes doing before understanding, writing a complete program first before dissecting its components.

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