PHP Exercises: Create a new string which is n copies of a given string

Last update on April 16 2025 12:52:37 (UTC/GMT +8 hours)

25. n Copies of a Given String

Write a PHP program to create a new string which is n (non-negative integer) copies of a given string.

Sample Solution:

PHP Code :

<?php
// Define a function that repeats a string $n times
function test($s, $n) 
{
    // Initialize an empty string to store the result
    $result = "";

    // Iterate $n times and concatenate the input string to the result
    for ($i = 0; $i < $n; $i++) {
        $result = $result . $s;
    }

    // Return the final result
    return $result;
}

// Test the function with different inputs
echo test("JS", 2) . "\n";
echo test("JS", 3) . "\n";
echo test("JS", 1) . "\n";
?>

Explanation:

• Function Definition:
• The test function takes two parameters: $s (a string to repeat) and $n (the number of times to repeat it).
• Initialize Result Variable:
• An empty string "$result" is initialized to accumulate the repeated string.
• Loop to Repeat the String:
• A for loop runs $n times, concatenating $s to $result in each iteration. By the end of the loop, $result contains $s repeated $n times.
• Return Result:
• The function returns the final accumulated string stored in $result.

Output:

JSJS
JSJSJS
JS

Visual Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a PHP script to generate a new string consisting of n concatenated copies of an input string using loops.
• Write a PHP function to replicate a string n times by employing built-in functions like str_repeat and custom error checks.
• Write a PHP program to simulate string repetition using iterative concatenation instead of built-in functions.
• Write a PHP script to validate the integer n and then output the repeated string, handling edge cases such as n equals 0.

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