12.8 Nested Loops

Duration: 8 min

This video lesson is available to enrolled students.

Return to /learn/BPSC/part-3-python/control-flow-looping/jump-nested-loops/asset-128-nested-loops after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About the Course: About the Course
  2. Section 1 | Language (Hindi): भाषा, लिपि, ध्वनि, वर्ण, अक्षर, स्वर, व्यंजन, मात्रा और संयुक्ताक्षर, वर्तनी, वर्ण-विन्यास, अनुस्वार, अनुनासिक, चंद्रबिंदु और ‘र’ के रूप, शब्द, पद और शब्द-भेद, संज्ञा और सर्वनाम, विशेषण और क्रिया, लिंग, वचन, पुरुष और कारक, काल, वाच्य, वाक्य और वाक्य-भेद, संधि, समास, विलोम शब्द, पर्यायवाची शब्द, सामान्य अशुद्धियाँ, अनेक शब्दों के लिए एक शब्द, मुहावरे और लोकोक्तियाँ, अपठित गद्यांश और अपठित पद्यांश, Multi-Topic Content (Cross-Concept Material), वर्णमाला
  3. Section 1 | Language (उर्दू भाषा — 22 प्रश्न (निश्चित)): Spelling & Diacritics, Grammar (اسم, فعل, صفت, ضمیر), Vocabulary, Idioms & Proverbs, Comprehension
  4. Section 1 | Language (বাংলা / बांग्ला भाषा — 22 प्रश्न (निश्चित)): Bangla Script and Sounds, Bangla Grammar and Usage, Bangla Word Formation and Vocabulary, Reading and Text Interpretation
  5. Section 1 | Language (English): Vocabulary, Noun, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Pronoun, Verb, Adverb, Preposition, Articles, Determiner, Conjunction, Modals, Active Passive Voice (Voice), Direct and Indirect Speech, Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Construction, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage), Verbal Analogy (Word Based Analogy), Facts, Inference and Judgements
  6. Section 2 | Primary Maths & Reasoning: Ratio and Proportion (Ratios), Divisibility Rules, Mixture and Alligation, Permutation and Combination, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Percentage, Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Mensuration and Geometry, Age Problems, Arithmetic, Powers and Exponents (Surds and Indices), Algebra, Probability, Trigonometry, Syllogisms, Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence
  7. Section 2 | General Awareness (GK + Current Affairs): Polity, Physics, Biology, State Wise GK, Chemistry, History, Geography, Indian Economy, Environment, GK- Current Affairs, Static General Knowledge
  8. Section 3 | Computer System and Org. (CSO): Basics of COA, Floating Point Rep, Cache Memory Organization, Instr Formats & Modes, Programming the Basic Computer, Input Output Organisation, Register Transfer and Microoperations, Control Unit Design
  9. Section 3 | 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, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control
  10. Section 3 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Process Synchronization
  11. Section 3 | Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics
  12. Section 3 | Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Shortest Path Algos
  13. Section 3 | Theory Of Computation & Compiler Design: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization
  14. Section 3 | Emerging Trends (AI, Societal Ethics & MS Office): Artificial Intelligence, Emerging Tech Trends, Society, Law & Ethics, MS Office Applications
  15. Section 3 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Maintenance and Configuration Management, Software Testing
  16. Section 3 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  17. Section 3 | OOPS, C++, JAVA, HTML: OOPS with C++, Java, HTML Basics, CSS
  18. Section 3 | Java: Java Fundamentals, Array, String, IO & References
  19. Section 3 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  20. Section 3 | Digital Electronics: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  21. Section 3 | Multimedia: Multimedia
  22. BPSC Previous Year Papers:
  23. BPSC Full Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This video is a comprehensive educational lecture on nested loops in Python, presented by an instructor on a digital whiteboard. The lesson begins with a definition of a nested loop as a loop inside another loop, explaining that the outer loop runs first and the inner loop completes all its iterations for each single iteration of the outer loop. The instructor then provides a general Python code structure for nested for loops using `range()` functions. A simple example is demonstrated with a `for` loop nested inside another `for` loop, where the outer loop runs for `range(3)` and the inner loop for `range(2)`, resulting in the output of coordinate pairs (i, j). The instructor uses a step-by-step walkthrough, writing out the values of the loop variables `i` and `j` to illustrate the execution flow. The lesson progresses to a `while` loop example, showing a nested `while` loop structure with `i` and `j` counters, and demonstrates its output. Finally, a mixed `for-while` nested loop example is presented, where a `for` loop controls the outer iteration and a `while` loop handles the inner iteration, printing a multiplication table. The video concludes with a 'Thanks' slide.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a title slide displaying 'Nested Loops' on a dark background. The instructor, a man in a black polo shirt, stands in front of a digital whiteboard. He begins by defining a nested loop as 'a loop inside another loop' and explains the execution order: 'The outer loop runs first' and 'For each iteration of the outer loop, the inner loop runs completely'. He then writes the general syntax for a nested for loop on the board: `for i in range(outer_limit):` followed by `for j in range(inner_limit):` and a placeholder for the inner loop body, `# inner loop body`. He uses a stylus to point to the code as he explains it.

  2. 2:00 – 5:00 02:00-05:00

    The instructor transitions to a 'Simple Example (for-for loop)' on the digital board. The code shown is `for i in range(3):` nested within `for j in range(2):` with `print(i,j)` as the inner loop body. He explains the execution step-by-step. He writes the initial values `i = 0` and `j = 0` and then traces the loop's behavior. For the first iteration of the outer loop (i=0), the inner loop runs twice: first with j=0, printing (0,0), and then with j=1, printing (0,1). He continues this process for i=1 and i=2, writing the output pairs (1,0), (1,1), (2,0), and (2,1) on the board. He uses arrows to illustrate the flow of control between the loops, clearly showing how the inner loop completes its full cycle before the outer loop advances.

  3. 5:00 – 7:52 05:00-07:52

    The instructor introduces a 'Nested while Loop Example'. The code on the board shows `i = 1` and a `while i <= 3:` loop, with a nested `while j <= 2:` loop inside it, printing `print(i,j)` and incrementing `j`. He demonstrates the execution, starting with i=1, j=1, printing (1,1), then j=2, printing (1,2), and then j=3, which breaks the inner loop. He then shows i=2, j=1, printing (2,1), and so on, until i=3, j=2, printing (3,2). Next, he presents a 'for-while Nested Loop' example, where a `for i in range(1,4):` loop is nested with a `while j <= 3:` loop. He explains that for each value of i (1, 2, 3), the inner while loop will run, printing `i*j` for j=1, 2, 3. He writes the resulting multiplication table on the board: 1 2 3, 2 4 6, 3 6 9. The video concludes with a 'Thanks' slide.

The video provides a clear, step-by-step tutorial on nested loops in Python, progressing from a general definition to specific code examples. It effectively uses a digital whiteboard to visually trace the execution of nested for loops, while loops, and a mixed for-while loop, making the concept of loop control flow and variable state changes easy to understand. The instructor's methodical approach, with detailed walkthroughs and on-screen annotations, reinforces the core principle that the inner loop completes all its iterations for each single iteration of the outer loop.

Loading lesson…