Question

Use PHP to perform the following operations: 1. define an array having at least 20 elements representing the grade of some students, i.e., 0<=$grade[i]<=100. 2. find out the length of the array 3. use switch to work on each element, converting a numeric grade to a letter grade and print the letter grade. The rules are below: A 90 - 100 B 80 - 89 C 70 - 79 D 60 - 69 F 0 - 59

Answer 1

Following is the answer:

<?php

//define the array of 20 elements

$array = array(60,65,75,85,95,78,89,46,93,76,36,79,69,79,85,63,60,79,74,83);

//prints the length of the array

echo "Length of the array: " . sizeof($array);

$i = 0;

//prints the grades using while loop

while($i < sizeof($array)){

echo "<br />";

if($array[$i] >= 90 && $array[$i] <= 100){

echo $array[$i] . ": " . "A" . "\n";

}else if($array[$i] >= 80 && $array[$i] <= 89){

echo $array[$i] . ": " . "B" . "\n";

}else if($array[$i] >= 70 && $array[$i] <= 79){

echo $array[$i] . ": " . "C" . "\n";

}else if($array[$i] >= 60 && $array[$i] <= 69){

echo $array[$i] . ": " . "D" . "\n";

}else {

echo $array[$i] . ": " . "F" . "\n";

}

$i+=1;

}

?>

Output: