Programming Fundamentals Concepts
22 concepts · Grades 6-8, 9-12 · 25 prerequisite connections
This family view narrows the full concept map to one connected cluster. Read it from left to right: earlier nodes support later ones, and dense middle sections usually mark the concepts that hold the largest share of future work together.
Use the graph to plan review, then use the full concept list below to open precise pages for definitions, examples, and related content. That combination keeps the page useful for both human study flow and crawlable internal linking.
Concept Dependency Graph
Concepts flow left to right, from foundational to advanced. Hover to highlight connections. Click any concept to learn more.
Connected Families
Programming Fundamentals concepts have 12 connections to other families.
All Programming Fundamentals Concepts
Sequence
Executing a series of instructions one after another in a fixed, specific order. In sequential execution, each instruction must complete before the next one begins, and the order in which statements appear determines the order in which they run.
Selection
Choosing which block of code to execute based on whether a condition is true or false. Selection allows programs to make decisions, following one path when a condition holds and a different path otherwise, using constructs like if, else-if, and else.
Iteration
Repeating a block of instructions multiple times until a stopping condition is satisfied. Iteration is one of the three fundamental control structures (along with sequence and selection) and is implemented through while loops, for loops, and other looping constructs.
Variable
A named container in a program that stores a value, which can be read, updated, or replaced. Variables have a name (identifier), a value (the data stored), and in many languages a type (what kind of data it holds).
Data Types
Categories that classify data values and determine which operations can validly be performed on them. Common data types include integers, floating-point numbers, strings, booleans, and arrays, each with its own set of permitted operations.
Boolean Logic
A system of logic that works with only two possible values—true and false—combined using the operators AND, OR, and NOT. Boolean logic provides the mathematical foundation for all decision-making in computing, from simple if-statements to complex database queries and digital circuit design.
Function (Programming)
A named, reusable block of code that performs a specific task, taking input (parameters) and optionally returning output (a return value). Functions allow you to write a piece of logic once and use it many times throughout a program.
Parameters
Named values declared in a function definition that act as placeholders for the actual data (arguments) passed in when the function is called. Parameters allow the same function to operate on different data each time it is invoked.
Input/Output
The mechanisms by which a program receives data from the outside world (input) and sends results back (output). Input can come from keyboards, files, sensors, or network connections; output can go to screens, files, printers, or other devices.
Event
A detectable action or occurrence in a program—such as a user click, key press, mouse movement, or timer expiry—that the program can respond to by executing a predefined event handler function.
Assignment
The operation of storing a value in a variable. The variable name goes on the left of the assignment operator, and the value or expression goes on the right. The right side is evaluated first, then the result is stored in the variable on the left.
Integer
A data type that represents whole numbers (positive, negative, or zero) without decimal points. Integers are stored exactly in memory and support arithmetic operations like addition, subtraction, multiplication, and integer division.
String
A data type that represents a sequence of characters (text), enclosed in quotation marks. Strings support operations like concatenation (joining), slicing (extracting substrings), searching, and comparison, and can contain letters, digits, spaces, and special characters.
Boolean
A data type representing a logical value that can only be true or false—nothing else. Booleans are produced by comparison operators (==, <, >, !=) and consumed by control structures (if-statements, while-loops) to make decisions.
Return Values
The value that a function sends back to the code that called it, specified by the return statement. When a function executes a return statement, it immediately stops running and passes the specified value back to the caller, where it can be stored, used in expressions, or passed to other functions.
Scope
The region of a program where a variable is accessible. Variables defined inside a function have local scope and exist only within that function. Variables defined outside all functions have global scope and are accessible from anywhere in the program.
Nested Conditionals
Conditional statements placed inside other conditional statements, creating multiple levels of decision-making. The inner condition is only evaluated when the outer condition is true, allowing programs to model complex, multi-step decisions.
While Loop
A control structure that repeats a block of code as long as a specified condition remains true. The condition is checked before each iteration, and if it is false from the start, the loop body never executes at all.
For Loop
A control structure that repeats a block of code a specific number of times or once for each item in a collection. The loop variable is automatically set to each successive value in the range or collection, eliminating the need to manually update it.
Event Handler
A function that is automatically called when a specific event occurs, such as a button click, key press, or timer tick. The handler is registered (attached) to an event source once, and then the system invokes it every time that event fires.
File Operations
The operations of reading data from files and writing data to files on a storage device, allowing programs to persist information beyond a single run. The standard pattern is: open the file, read from or write to it, then close the file to ensure data is saved properly.
Function
A named, reusable block of code that performs a specific task and can optionally accept inputs (parameters) and return a result. Functions allow you to organize code into logical units, write a solution once, and invoke it from anywhere in the program.