If Else statement

<?php
$n= 10;

if($n==10){
 echo $n;
}else if($n==20){
 echo $n;
}
else if($n==20){
 echo $n;
}
else if($n==30){
 echo $n;
}
else if($n==40){
 echo $n;
}
else if($n==50){
 echo $n;
}
else if($n==60){
 echo $n;
}
else if($n==70){
 echo $n;
}
else if($n==80){
 echo $n;
}
else if($n==90){
 echo $n;
}
else if($n==100){
 echo $n;
}
else if($n==110){
 echo $n;
}
else{
    echo "Nothing matched";
}




?>