Functions in JS

Duration: 3 min

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Inside: a video lesson and guided study material.

Module outline

  1. Numerical Ability & Problem Solving: Speed Mathematics and Basic Mathematics, Arithmetic, Number System, HCF LCM, Divisibility Rules, Percentage, Ratio and Proportion (Ratios), Average, Profit and Loss, Simple Interest and Compound Interest, Mixture and Alligation, Time and Work, Pipe and Cistern, Speed Time and Distance, Age Problems, Partnership, Data Interpretation, Mental Ability, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Algebra, Statistics, Logarithm, Mensuration and Geometry, Permutation and Combination, Probability, Sequences and Series, Powers, Surds and Logarithms, Subject-Verb Agreement, Sentence Completion, Geometry, Sentence Structure and Correction, Data Sufficiency, Trigonometry, Measurement and Quantity Take-Off, Signal Space and Optimum Detection, Probability, Statistics, Algebra, Time and Work, Speed, Time and Distance, Data Interpretation, Combinatorics
  2. Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Logical Sequence Of Words, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, Selection Decision Table (Decision Making), Alphabet and Word Tests, Numerical Reasoning, Number System, Averages, Mixtures and Alligation, Percentages, Series Completion, Analogy and Classification, Patterns in Two-Dimensional Figures, Coding and Decoding, Mathematical Operations, Direction Sense, Logical Deduction and Induction, Syllogisms and Venn Diagrams, Critical Reasoning, Order, Ranking and Sequence, Reading Comprehension, Profit, Loss and Discount, Constraint Puzzles, Traverse Surveying, Ratio and Proportion, Mensuration, Permutations and Combinations, Clocks and Calendars, Assembling and Grouping of Shapes, Transformation of Shapes, Three-Dimensional Patterns and Visualization, Cubes and Dice, Vocabulary, Blood Relations
  3. General Knowledge & Current Affairs (India + Rajasthan): History, Geography, Polity, Indian Economy, Static General Knowledge, State Wise GK, GK- Current Affairs, Environment, Physics
  4. Computer Fundamentals & Operating Systems: Basics of COA, Floating Point Rep, Digital Systems & Boolean Basics, Number Representation, Number System, Introduction to OS, File Management, Windows OS, Unix OS, Linux OS, Register Transfer and Microoperations, Virtual Memory
  5. Computer Networks: Introduction to CN, Data Communication, DLL: Error Control, DLL: Access Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Application Layer, Hardware Basics, Network Security
  6. Cyber Security: Cyber Threats and Malware Attacks, Role of Internet and Web Services, Security in Mobile and Wireless Computing, Electronic Data Interchange and E-Commerce, Physical Security and Cryptography Basics, Intrusion Detection Systems (IDS), Cyber Safety and Security, Ethical Hacking
  7. Programming (C & OOP): C Fundamentals, Control Flow, Arrays & Pointers, Functions, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, OOPS with C++, Operators & Expressions, Sorting Algorithms, Java Fundamentals, Java
  8. MS Office & Data Processing: MS Office Applications, Basics of DBMS
  9. Internet & Web Technology: Society, Law & Ethics, Terms & Abbreviations, Keyboard Shortcuts, Emerging Tech Trends, Artificial Intelligence, Emerging Technologies, Internet Fundamentals, Website, Browser & Services, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video lecture provides a detailed introduction to creating functions in JavaScript. The instructor utilizes a PDF document titled "Creating Functions" which outlines the fundamental syntax rules. The text explains that a function is defined using the `function` keyword, followed by a unique name and parentheses. It specifies that function names can include letters, digits, underscores, and dollar signs, adhering to the same rules as variables. The parentheses may contain parameter names separated by commas, and the code to be executed is placed inside curly brackets.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The session begins with the instructor displaying a PDF slide titled "Creating Functions". The visible text details the syntax: "A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses ()." The instructor starts writing on the digital whiteboard, first scribbling some numbers like "0.03", "0x", "468", and "123 -> decimal" at the top. Then, they begin writing the word "function" and start a new example labeled "Sum(". The screen text further explains that the code to be executed is placed inside curly brackets, showing a template: `function name(parameter1, parameter2, parameter3) { // code to be executed }`.

  2. 2:00 – 2:47 02:00-02:47

    The instructor continues to flesh out the code examples. They write a function named `welcome` with empty parentheses: `function welcome() { document.write("Welcome"); }`. This demonstrates a function with no parameters. Next, they write a more complex example: `function Sum(a, b, c) { let s = a+b+c; }`. This shows how to define parameters `a`, `b`, and `c` inside the parentheses and use them within the function body to calculate a sum. The instructor underlines the function call `welcome()` at the bottom, indicating how the function is invoked.

The lecture effectively bridges the gap between theoretical documentation and practical coding. It starts by establishing the rigid syntax rules found in the PDF, such as the requirement for the `function` keyword and the use of curly brackets. The instructor then transitions to a hands-on demonstration, writing out a simple text-output function and a mathematical summation function. By explicitly writing the parameters `a`, `b`, and `c` and the calculation `let s = a+b+c`, the instructor clarifies how data is passed into a function and processed effectively.

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