PHP Exercises : Test whether a number is greater than 30, 20 or 10 using ternary operator

Last update on April 19 2025 11:49:44 (UTC/GMT +8 hours)

21. Ternary Operator Number Test

Write a PHP function to test whether a number is greater than 30, 20 or 10 using ternary operator.

Sample Solution: -

PHP Code:

<?php
// Function to test a given number using ternary operators
function trinary_Test($n){
    // Ternary operators used to check the value of $n and assign a corresponding message to $r
    $r = $n > 30
        ? "greater than 30"
        : ($n > 20
            ? "greater than 20"
            : ($n > 10
                ? "greater than 10"
                : "Input a number at least greater than 10!"));

    // Display the result with the input number
    echo $n . " : " . $r . "\n";
}

// Test the function with different input values
trinary_Test(32);
trinary_Test(21);
trinary_Test(12);
trinary_Test(4);
?>

Explanation:

Function Definition:

The function trinary_Test($n) takes one parameter, $n, which represents the number to be tested.

Ternary Operators:

Inside the function, a series of nested ternary operators are used to evaluate the value of $n:

If $n is greater than 30, it assigns the string "greater than 30" to $r.
If $n is greater than 20, it assigns "greater than 20".
If $n is greater than 10, it assigns "greater than 10".
If none of the above conditions are met, it assigns "Input a number at least greater than 10!".

Display Result:

The function uses echo to output the input number and its corresponding message stored in $r, formatted as "<number> : <message>".

Function Testing:

The function is called four times with different input values: 32, 21, 12, and 4. Each call tests the number against the defined conditions and outputs the appropriate message.

Output:

32 : greater than 30                                        
21 : greater than 20                                        
12 : greater than 10                                        
4 : Input a number atleast greater than 10!

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP function using nested ternary operators to classify a number into multiple ranges.
Write a PHP script to compare a number against several thresholds using a chained ternary operator.
Write a PHP script to output different messages based on numeric ranges evaluated solely with ternary operators.
Write a PHP function that accepts a number and returns a category label using nested ternary operators in a single expression.

PHP Code Editor:

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