12.12 Range Function

Duration: 8 min

This video lesson is available to enrolled students.

Return to /learn/HPSC-PGT-COMPUTER-SCIENCE/python-language/control-flow-looping/loop-programs/asset-1212-range-function after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. HPSC Interview Preparation: Interview Preparation
  2. Python Language: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis, DSA using Python
  3. Data Structure & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Sorting Algorithms, Minimum Spanning Trees, Time Complexity Analysis, Graph Theory, Shortest Path Algos
  4. Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  5. Computer System & Organisation: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer
  6. Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, SQL, File Organization & Indexing, Transaction Management, Concurrency Control
  7. Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling
  8. Digital Logic & Circuits: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  9. Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Pushdown Automata & CFG, Turing Machines, Moore & Mealy Machines
  10. Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  11. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, Data Warehousing & Mining
  12. Introduction to Emerging Trends: Emerging Tech Trends
  13. Digital Society & Cyber Law: Society, Law & Ethics
  14. HPSC PGT Previous Year Paper:
  15. HPSC Assistant Professor Previous Year Paper:
  16. Live Sessions: HPSC Live Sessions, EMRS TGT/PGT Live Class
  17. Full Mock Test:
  18. HPSC PGT - MOCK Test Series:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a comprehensive lecture on the Python `range()` function, presented by an instructor in front of a digital whiteboard. The lesson begins by introducing `range()` as a built-in function used to generate sequences of numbers, commonly with loops, and highlights its memory efficiency. The instructor then details the function's syntax, `range(start, stop, step)`, and explains that the `stop` value is always excluded. Using on-screen examples, the lecture demonstrates how to use `range()` with one, two, and three arguments, including negative steps to create descending sequences. The video also shows how to convert a `range` object into a list using the `list()` function and concludes by summarizing key characteristics, such as the requirement that the step cannot be zero and that `range()` returns a range object, not a list.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with the instructor introducing the topic, "Range Function," on a digital whiteboard. The on-screen text defines `range()` as a built-in function used to generate a sequence of numbers, commonly used with loops, and notes it generates numbers on demand, making it memory efficient. The instructor then begins to write the function's syntax, `range(start, stop, step)`, on the board, explaining the three parameters.

  2. 2:00 – 5:00 02:00-05:00

    The instructor provides a detailed example of `range(1, 6, 1)`, writing the code and then listing the resulting sequence: 1, 2, 3, 4, 5. He emphasizes that the stop value (6) is excluded, a key characteristic of the function. He then demonstrates another example, `range(1, 10, 2)`, to show how a step value of 2 creates a sequence of odd numbers: 1, 3, 5, 7, 9. The instructor also shows how to use `range()` with a single argument, `range(5)`, which defaults to a start of 0 and a step of 1, generating the sequence 0, 1, 2, 3, 4.

  3. 5:00 – 8:12 05:00-08:12

    The lecture continues with a demonstration of a negative step, `range(10, 0, -2)`, which generates a descending sequence: 10, 8, 6, 4, 2. The instructor then shows how to convert a `range` object into a list using `numbers = list(range(1, 6))`. The final segment summarizes the important characteristics of the `range()` function, including that the stop value is always excluded, the step cannot be zero, it supports both positive and negative steps, and it returns a `range` object, not a list. The video concludes with a "Thanks" message.

The video provides a clear, step-by-step tutorial on the Python `range()` function. It effectively progresses from a basic definition to detailed syntax and practical examples, using on-screen code and handwritten annotations to reinforce key concepts. The instructor's methodical approach, which includes demonstrating various parameter combinations and highlighting the function's memory-efficient nature, makes the material accessible for learners. The lesson concludes by consolidating the core principles, ensuring a solid understanding of how to use `range()` in Python programming.

Loading lesson…