PHP Conditional Statements Quiz
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Questions and Answers

When is the for statement used?

  • When you are unsure of how many times you want to execute a statement
  • When you want to execute a list of statements only
  • When you want to execute a statement an indefinite number of times
  • When you know exactly how many times you want to execute a statement (correct)
  • What happens if the parameter in the for statement is left empty?

  • The loop will run indefinitely (correct)
  • An error will occur
  • The loop will not execute at all
  • The loop will skip to the next iteration immediately
  • In the for statement, what happens if multiple expressions are separated by commas?

  • Only the first expression is evaluated
  • All expressions are evaluated, and the result is taken from the last expression (correct)
  • Only the last expression is evaluated
  • All expressions are evaluated, and the result is taken from the first expression
  • What does the foreach statement do in a loop?

    <p>It assigns the value of the current array element to $value</p> Signup and view all the answers

    How does the foreach statement handle iterating over an array?

    <p>It assigns each array element to $value sequentially</p> Signup and view all the answers

    What is the purpose of the switch statement in PHP?

    <p>To avoid long blocks of if..elseif..else code</p> Signup and view all the answers

    Which looping statement in PHP executes a block of code at least once?

    <p>do...while</p> Signup and view all the answers

    In PHP, which loop statement loops through a block of code for each element in an array?

    <p>foreach</p> Signup and view all the answers

    What happens in a 'while' loop if the condition is never met?

    <p>It never runs the loop</p> Signup and view all the answers

    Which loop statement is used when you want a block of code to run a specific number of times?

    <p>for</p> Signup and view all the answers

    What does the 'foreach' loop iterate over in PHP?

    <p>Elements of an array</p> Signup and view all the answers

    When should you use the if...else statement in PHP?

    <p>When you want to execute a set of code when a condition is true and another when the condition is not true</p> Signup and view all the answers

    What is the purpose of the elseif statement in PHP?

    <p>To execute some code if one of several conditions are true</p> Signup and view all the answers

    In PHP, what should be done if more than one line of code needs to be executed based on a condition?

    <p>Enclose the lines within curly braces</p> Signup and view all the answers

    What does the switch statement allow you to do in PHP?

    <p>Select one of many blocks of code to be executed</p> Signup and view all the answers

    What happens if a condition is not met in an if...else statement in PHP?

    <p>The code associated with the else part is executed</p> Signup and view all the answers

    Which statement in PHP allows you to execute different blocks of code based on different conditions?

    <p>switch statement</p> Signup and view all the answers

    Study Notes

    Conditional Statements

    • Conditional statements are used to perform different actions based on different decisions.
    • The if...else statement is used to execute a set of code when a condition is true and another set of code when the condition is false.
    • The elseif statement is used with the if...else statement to execute a set of code if one of several conditions is true.

    The if...else Statement

    • The if...else statement is used to execute some code if a condition is true and another code if a condition is false.
    • If more than one line should be executed if a condition is true/false, the lines should be enclosed within curly braces.

    The elseif Statement

    • The elseif statement is used to execute some code if one of several conditions are true.

    The Switch Statement

    • The switch statement is used to select one of many blocks of code to be executed.
    • The switch statement is used to avoid long blocks of if..elseif..else code.

    Looping

    • Looping statements are used to perform the same block of code to run a number of times.
    • PHP has four types of looping statements: while, do...while, for, and foreach.

    The while Statement

    • The while statement will execute a block of code if and as long as a condition is true.
    • The while statement will continue to run as long as the specified condition is true.

    The do...while Statement

    • The do...while statement will execute a block of code at least once, and then repeat the loop as long as a condition is true.
    • The do...while statement will continue to increment the variable as long as it has a value of less than or equal to a specified value.

    The for Statement

    • The for statement is the most advanced of the loops in PHP.
    • The for statement is used when you know how many times you want to execute a statement or a list of statements.
    • The for statement has three parameters: initialization, condition, and increment.

    The foreach Statement

    • The foreach statement is used to loop through an array.
    • For every loop, the value of the current array element is assigned to $value (and the array pointer is moved by one).

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    Description

    Test your knowledge on using if...else and elseif statements in PHP to control the flow of your code based on different conditions.

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