How can nested if-else statements be used effectively in PHP to assign values based on multiple criteria?

Nested if-else statements can be used effectively in PHP to assign values based on multiple criteria by checking multiple conditions in a hierarchical manner. This allows for more complex decision-making processes where different outcomes are determined based on various combinations of conditions. 

$score = 85;
$grade = '';

if ($score >= 90) {
    $grade = 'A';
} else {
    if ($score >= 80) {
        $grade = 'B';
    } else {
        if ($score >= 70) {
            $grade = 'C';
        } else {
            $grade = 'D';
        }
    }
}

echo "Grade: " . $grade;

Keywords

nested if-else PHP assign values multiple criteria conditional statements

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