CPSC112 - Introduction to Programming
Comprehensive Study Notes
1. Programming Fundamentals
What is Programming?
Programming is the process of creating a set of instructions that tell a computer how to perform
a task. It involves problem-solving, logical thinking, and translating human ideas into computer-
readable code.
Key Programming Concepts
Algorithm: A step-by-step procedure for solving a problem
Source Code: Human-readable instructions written in a programming language
Compilation/Interpretation: Converting source code into machine-executable format
Debugging: The process of finding and fixing errors in code
2. Variables and Data Types
Variables
Variables are containers that store data values. They have names (identifiers) and can hold
different types of information.
Important Rules for Variable Names:
Must start with a letter or underscore
Cannot contain spaces or special characters (except underscore)
Case-sensitive
Should be descriptive and meaningful
Fundamental Data Types
Integer (int): Whole numbers (e.g., 5, -10, 0)
Float/Double: Decimal numbers (e.g., 3.14, -2.5)
, String: Text data enclosed in quotes (e.g., "Hello World")
Boolean: True or false values
Character (char): Single letters or symbols
Variable Declaration and Assignment
Variables must be declared (created) before use and can be assigned values:
int age = 25;
string name = "John";
Boolean is Student = true;
3. Control Structures
Conditional Statements
Conditional statements allow programs to make decisions based on different conditions.
If Statement: Executes code when a condition is true. If-Else Statement: Provides an alternative
path when the condition is false. Switch Statement: Selects one of many code blocks to execute
Key Comparison Operators:
== (equal to)
!= (not equal to)
< (less than)
> (greater than)
<= (less than or equal)
>= (greater than or equal)
Loops
Loops allow repetitive execution of code blocks.
For Loop: Used when the number of iterations is known While Loop: Continues while a
condition remains true Do-While Loop: Executes at least once, then checks condition
Loop Control Keywords:
Break: Exits the loop immediately
Comprehensive Study Notes
1. Programming Fundamentals
What is Programming?
Programming is the process of creating a set of instructions that tell a computer how to perform
a task. It involves problem-solving, logical thinking, and translating human ideas into computer-
readable code.
Key Programming Concepts
Algorithm: A step-by-step procedure for solving a problem
Source Code: Human-readable instructions written in a programming language
Compilation/Interpretation: Converting source code into machine-executable format
Debugging: The process of finding and fixing errors in code
2. Variables and Data Types
Variables
Variables are containers that store data values. They have names (identifiers) and can hold
different types of information.
Important Rules for Variable Names:
Must start with a letter or underscore
Cannot contain spaces or special characters (except underscore)
Case-sensitive
Should be descriptive and meaningful
Fundamental Data Types
Integer (int): Whole numbers (e.g., 5, -10, 0)
Float/Double: Decimal numbers (e.g., 3.14, -2.5)
, String: Text data enclosed in quotes (e.g., "Hello World")
Boolean: True or false values
Character (char): Single letters or symbols
Variable Declaration and Assignment
Variables must be declared (created) before use and can be assigned values:
int age = 25;
string name = "John";
Boolean is Student = true;
3. Control Structures
Conditional Statements
Conditional statements allow programs to make decisions based on different conditions.
If Statement: Executes code when a condition is true. If-Else Statement: Provides an alternative
path when the condition is false. Switch Statement: Selects one of many code blocks to execute
Key Comparison Operators:
== (equal to)
!= (not equal to)
< (less than)
> (greater than)
<= (less than or equal)
>= (greater than or equal)
Loops
Loops allow repetitive execution of code blocks.
For Loop: Used when the number of iterations is known While Loop: Continues while a
condition remains true Do-While Loop: Executes at least once, then checks condition
Loop Control Keywords:
Break: Exits the loop immediately
