PHP Programming Basics and Examples Tutorial (2nd Edition) Homework Answers129

Chapter 1: Introduction to PHPQ1: What is the difference between a variable and a constant?
A1: A variable is a container that can store a value and can be changed during the execution of a program. A constant is a container that holds a fixed value and cannot be changed during the execution of a program.
Q2: What does the `echo` statement do?
A2: The `echo` statement outputs data to the standard output.
Q3: What is the difference between a single-line comment and a multi-line comment in PHP?
A3: A single-line comment starts with the `//` characters and ends at the end of the line. A multi-line comment starts with the `/*` characters and ends with the `*/` characters.

Chapter 2: Data TypesQ4: What is the data type of the following statement: `$name = "John"`?
A4: String
Q5: What is the data type of the following statement: `$age = 30`?
A5: Integer
Q6: What is the data type of the following statement: `$salary = 1234.56`?
A6: Float

Chapter 3: OperatorsQ7: What is the difference between the `==` and `===` comparison operators?
A7: The `==` operator checks if two values are equal, while the `===` operator checks if two values are equal and of the same type.
Q8: What is the result of the expression: `10 + 5 * 2`?
A8: 20
Q9: What is the result of the expression: `10 % 3`?
A9: 1

Chapter 4: Control StructuresQ10: What is the difference between an `if` statement and a `switch` statement?
A10: An `if` statement checks if a condition is true and executes a block of code if the condition is met. A `switch` statement checks the value of a variable against a series of cases and executes the block of code associated with the matching case.
Q11: What is the syntax of a `for` loop?
A11: `for ($i = 0; $i < 10; $i++) { ... }`
Q12: What is the difference between a `break` statement and a `continue` statement?
A12: A `break` statement exits a loop, while a `continue` statement skips the current iteration of a loop and continues with the next iteration.

Chapter 5: FunctionsQ13: What is the purpose of a function?
A13: A function is a block of code that can be executed multiple times with different parameters.
Q14: What is the syntax of a function declaration?
A14: `function functionName($param1, $param2, ...)`
Q15: What is the difference between a parameter and an argument?
A15: A parameter is a placeholder for a value in a function declaration, while an argument is a value that is passed to a function when it is called.

2025-01-07

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