<?php
echo "EX1:\n";
$age = 18;
if($age<18){
    echo "You are a minor.\n";
}
else{
    echo "You are an adult.\n";
}
echo "EX2:\n";
$score = 5;
if($score>=90){
    echo "Excellent\n";
}
elseif(($score>=75)&&($score<=89)){
    echo "Very Good\n";
}
elseif (($score>=50)&&($score<=74)){
    echo "Good\n";
}
else{
    echo "failed\n";
}
echo "EX3:\n";
$day = 8;
switch($day){
    case 1:
        echo "lundi";
        break;
    case 2:
        echo "mardi";
        break;
    case 3:
        echo "mercredi";
        break;
    case 4:
        echo "jeudi";
        break;
    case 5:
        echo "vendredi";
        break;
    case 6:
        echo "samedi";
        break;
    default:
        echo "Invalid day.";    
}