Loops and If

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Loops and If#

Example code#

<?php

echo "hello php";
print "Hello Amigos";
print("http://localhost/wp/page1");
print("\n");

$output = 0;
$counter = 0;

print("For Loop\n");
for ($counter = 0; $counter <= 20; $counter++) {
    echo("for: ".$counter."\n");
}
$counter = 0;
print("\nWhile Loop\n");
while ($counter < 10) {
    echo("while: ".$counter."\n");
    $counter += 1;
}

$num = 12;

if ($num < 10) {
    echo "This was less than ten";
} else if ($num < 15) {
    echo "This was less than 15";
} else {
    echo "This was greater than 15";
}

?>

Purpose: Demonstrate basic output, looping structures, and conditional statements.

Breakdown:

  1. Output Statements:

    • echo "hello php";: Prints the string “hello php” to the output.

    • print "Hello Amigos";: Prints the string “Hello Amigos” to the output.

    • print("http://localhost/wp/page1");: Prints the URL “http://localhost/wp/page1” to the output.

    • print("\n");: Prints a newline character to the output.

  2. Variable Initialization:

    • $output = 0;: Initializes a variable named $output with the value 0.

    • $counter = 0;: Initializes a variable named $counter with the value 0.

  3. For Loop:

    • for ($counter = 0; $counter <= 20; $counter++) { ... }: Iterates from $counter equal to 0 up to 20 (inclusive), incrementing $counter by 1 in each iteration. Inside the loop, it prints the current value of $counter.

  4. While Loop:

    • while ($counter < 10) { ... }: Continues to execute as long as $counter is less than 10. Inside the loop, it prints the current value of $counter and increments $counter by 1.

  5. Conditional Statements:

    • if ($num < 10) { ... } else if ($num < 15) { ... } else { ... }: Checks the value of $num and executes the appropriate code block based on the comparison.

Summary: The code demonstrates the following PHP concepts:

  • Output using echo and print.

  • Variable declaration and assignment.

  • Looping structures: for and while.

  • Conditional statements: if, else if, and else.

The code effectively illustrates how to use these concepts to perform basic operations and control the flow of execution in a PHP script.

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