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Questions and Answers
Match the C# syntax elements with their explanations:
Match the C# syntax elements with their explanations:
Main method = Starting point of a C# program. float = Data type with 7-digit precision. using = Includes namespaces for class access. Console.ReadLine() = Method to get user input.
Match the C# data types with their characteristics:
Match the C# data types with their characteristics:
int = Represents whole numbers. double = Supports decimals with 15-digit precision. char = Represents a single character. bool = Can hold true or false values.
Match the comment styles in C# to their types:
Match the comment styles in C# to their types:
// = Single-line comment. /* */ = Multi-line comment. #region = Used to define a code region. /**/ = Used for documentation comments.
Match the operator types with their functions:
Match the operator types with their functions:
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Match the C# programming concepts with their definitions:
Match the C# programming concepts with their definitions:
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Match the naming conventions in C# with their descriptions:
Match the naming conventions in C# with their descriptions:
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Match the C# control structures with their uses:
Match the C# control structures with their uses:
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Match the components of a C# declaration with their elements:
Match the components of a C# declaration with their elements:
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Match the output expressions in C# with their expected results:
Match the output expressions in C# with their expected results:
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Match the keywords in C# with their purposes:
Match the keywords in C# with their purposes:
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Study Notes
Introduction
-
Mainmethod: The starting point of a C# program, declared asstatic void Main(string[] args). - Compiled Language: Translates code into machine code before execution (example: C#).
-
usingkeyword: Allows inclusion of namespaces to access classes without full qualification. -
Comments: Single-line:
//; Multi-line:/* */. - Object-Oriented Programming (OOP): C# utilizes concepts like classes, inheritance, and polymorphism.
Basic Syntax
-
Variable Declaration (with initial value):
int number = 10;. -
Single-line Comment:
//. -
if-elsestatement (positive/negative):
if (number > 0)
{
Console.WriteLine("Positive");
}
else
{
Console.WriteLine("Negative");
}
-
User Input:
Console.ReadLine(). - Naming Conventions: camelCase for variables, PascalCase for classes.
- Data Types:
-
int: Whole numbers. -
double: Decimals. -
bool: Boolean (true/false). -
floatvs.double:floathas 7-digit precision,doublehas 15-digit precision. -
charvs.string:charrepresents a single character;stringis a sequence of characters. -
Boolean Variable:
bool isTrue = true; -
intrange: -2,147,483,648 to 2,147,483,647.
Operators
-
Assignment Operator (
=): Assigns the right-hand value to the left-hand variable. -
Increment Operator (
++): Used in loops (example:for (int i = 0; i < 5; i++) { ... }) -
Logical Operators (
&&,||): -
&&: True if both conditions are true. -
||: True if at least one condition is true. -
Modulo Operator (
%): (Example: 15 % 4 = 3) -
Conditional Operator (
?:): Returns one of two values based on a condition (example:result = (x > 5) ? 10 : 5;)
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