Armstrong Number10 Mar 2025 | 2 min read An Armstrong number is the one whose value is equal to the sum of the cubes of its digits. 0, 1, 153, 371, 407, 471, etc are Armstrong numbers. For example, Logic:
Armstrong number in PHPBelow program checks whether 407 is Armstrong or not. Example: ExampleExecute NowOutput:  Look at the above snapshot, the output displays that 407 is an Armstrong number. Armstrong number using Form in PHPA number is Armstrong or can also be checked using a form. Example: ExampleExecute NowOutput: On entering the number 371, we got the following output.  On entering the number 9999, we got the following output.  Next TopicPalindrome Number |
Area of Triangle Area of a triangle is calculated by the following Mathematical formula, (base * height) / 2 = Area Area of Triangle in PHP Program to calculate area of triangle with base as 10 and height as 15 is shown. Example: Example <?php $base = 10; $height = 15; echo...
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Table of Number A table of a number can be printed using a loop in program. Logic: Define the number. Run for loop. Multiply the number with for loop output. Example: We'll print the table of 7. Example <?php define('a', 7); for($i=1; $i<=10; $i++) { echo $i*a; echo '<br>';...
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Number Triangle Number triangle in PHP can be printed using for and foreach loop. There are a lot of patterns in number triangle. Some of them are show here. Pattern1 Example <?php $k=1; for($i=0;$i<4;$i++){ for($j=0;$j<=$i;$j++){ echo $k." "; $k++; } echo "<br>"; } ?> Execute Now Output: Pattern 2 Example <?php $k=1; for($i=0;$i<5;$i++){ for($j=0;$j<=$i;$j++){ if($j%2==0) { $k=0; } else { $k=1; } echo $k." "; } echo "<br>"; } ?> Execute Now Output: Pattern 3 Example <?php for($i=0;$i<=5;$i++){ for($j=1;$j<=$i;$j++){ echo $j; } echo "<br>"; } ?> Execute Now Output: Pattern 4 Example <?php for($i=0;$i>=5;$i++){ for($j=1;$j>=$i;$j++){ echo $i; } echo "<br>"; } ?< Execute...
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Adding Two Numbers There are three methods to add two numbers: Adding in simple code in PHP Adding in form in PHP Adding without using arithmetic operator (+). Adding in Simple Code Addition of two numbers 15 and 30 is shown here. Example: Example <?php $x=15; $y=30; $z=$x+$y; echo "Sum: ",$z; ?> Execute Now Output: Adding in Form Two numbers can be added...
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Reverse number A number can be written in reverse order. For example 12345 = 54321 Logic: Declare a variable to store reverse number and initialize it with 0. Multiply the reverse number by 10, add the remainder which comes after dividing the number by 10. Reversing Number in PHP Example: Below progrem shows digits...
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Sum of Digits To find sum of digits of a number just add all the digits. For example, 14597 = 1 + 4 + 5 + 9 + 7 14597 = 26 Logic: Take the number. Divide the number by 10. Add the remainder to a variable. Repeat the process until remainder is 0. Example: Given...
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Alphabet Triangle Pattern Some different alphabet triangle patterns using range() function in PHP are shown below. Pattern 1 Example <?php $alpha = range('A', 'Z'); for($i=0; $i<5; $i++){ for($j=5; $j>$i; $j--){ echo $alpha[$i]; } echo "<br>"; } ?> Execute Now Output: Pattern 2 Example <?php $alpha = range('A', 'Z'); for($i=0;...
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Swapping two numbers Two numbers can be swapped or interchanged. It means first number will become second and second number will become first. For example a = 20, b = 30 After swapping, a = 30, b = 20 There are two methods for swapping: By using third variable. Without using third variable. Swapping...
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Area of a Rectangle Area of a rectangle is calculated by the mathematical formula, Length ∗ Breadth = Area Logic: Take two variables. Multiply both of them. Area of Rectangle in PHP Program to calculate area of rectangle with length as 14 and width as 12 is shown. Example: Example <?php $length = 14; $width...
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Even Odd Program Even numbers are those which are divisible by 2. Numbers like 2,4,6,8,10, etc are even. Odd numbers are those which are not divisible by 2. Numbers Like 1, 3, 5, 7, 9, 11, etc are odd. Logic: Take a number. Divide it by 2. If the remainder is...
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