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<?php

//question 1 calculate the sum of even numbers


// $z=[6,7,9,4,5,8];
// $total=0;
// foreach($z as $zaki){
//     if($zaki%2==0){
//          $total+=$zaki;
//     } 
// }
// echo "the sum is $total";

//question 2 sum up the two  arrays



// $z=[6,7,9,4,5,8];
// $h=[6,7,9,4,5,8];
// $zaki=[];
// for($i=0;$i<=5;$i++){
//     $zaki[$i]=$z[$i]+$h[$i];
// }
// print_r($zaki);




// function to calculate the sum of two absolute values

// function sum_of_abs($x){
//     if($x<0)
//     return $x*-1;
//     else
//     return $x;


// }

// $sum=sum_of_abs(-5)+sum_of_abs(-6);
// echo $sum;


// question 4 print this loop




// for($r=1;$r<=5;$r++){
//     for($c=1;$c<=$r;$c++){
//         echo "X";
        
//     }
//     echo "<BR>";
// }


//question 5 print the same loop but in row 2 must be 22 and row four is 4444
for($r=1;$r<=5;$r++){
    for($c=1;$c<=$r;$c++){
        if($r%2==0)
        echo "$r";

else
echo "X";

}
echo "<BR>";
}
// so2al array
// so2al pattern
// so2al function
// dool written code
// wel ba2y hayb2a 3ala kolo bel datbase connection
?>
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