Conquer Computer Science: Algorithms & Coding (Part 5/5)

Analyze the problem and requirements, decompose the solution, and abstract the essential details. Design, code, and test iteratively with flow charts, pseudocode, and system diagrams, then deploy and maintain.

Design software by breaking systems into subsystems through decomposition, using structured diagrams, flowcharts, and pseudocode to model input, output, processing, and storage.

Master standard programming methods—from swapping with a temporary store and counting to totaling, averages, maxima and minima, modularity, and linear search with break and bubble sort.

Explore how programming languages translate human instructions into machine code via compilation or interpretation. See how pseudocode guides planning and focus on Python and Java as core languages.

Begin with Python idle and print strings, use input, variables, and snake_case filenames. Build a hello world script that asks for name and age, converts to int, and uses if/else.

Learn to build and run a basic Java program: use a template, print output with System.out.println, read input via a scanner, handle strings and integers, and apply if-else logic.

Write maintainable code by commenting thoroughly and naming variables, sections, and files meaningfully. Break programs into modules to improve readability and future adaptability.

Explore arithmetic, modular, and floor division, plus increment and boolean operators, across languages like Python and Java, including symbols such as +, *, /, %, //, **, and ++/+=.

Explore how conditional statements guide program flow using if, else, and switch/case across languages, with Python's elif and examples demonstrating booleans, comparisons, and nesting.

Build a Python guess the number game that uses random to generate 1–100, accepts user input, converts to int, and loops with a flag and a counter until correct.

Build a Java guessing game that generates a random number from 1 to 100, reads user input with a Scanner, and tracks guesses with a while loop.

Master iteration by exploring for and while loops, learn precondition and postcondition looping, and see how counters, indentation, and language syntax implement repetition in Python, Java, and pseudocode.

Explore nested statements in programming by nesting conditionals and loops, and learn how outer and inner conditionals interact, how inner loops run, and how to trace nested constructs.

Enhance the guessing game in Python by adding range validation, input type checks, and robust error handling with min/max variables, string-to-integer conversion, and try/except.

Improve the Java guessing game by introducing min and max constants, adding range validation, and implementing a try-catch to handle non-integer input, with a loop to re-prompt.

Understand the difference between global and local variables, where to declare them in Python and Java, and how scope affects access and program memory.

Explore strings and nested loops in Python by building a reverse function and testing palindromes. Check for palindromes inside words and find the longest palindrome using loops and string slicing.

Explore how libraries extend programming languages, distinguishing built-in versus imported libraries across Python, Java, and pseudocode, and learn to import and call functions with dot notation.

Explore arrays in depth, from one-dimensional lists to two-dimensional tables, including fixed sizes, null entries, indexing, and traversal in pseudocode, Python lists, and Java arrays.

Explore how programs store persistent data in external files, including text, csv, and binary formats, why self-modifying code is avoided, and how file naming and extensions work.