"; print "Operator: $op

"; if( $op === "add" ) { $ans = $v1 + $v2; print "$v1 + $v2 = $ans."; } else if ( $op === "sub" ) { $ans = $v1 - $v2; print "$v1 - $v2 = $ans."; } else if ( $op === "mul" ) { $ans = $v1 * $v2; print "$v1 * $v2 = $ans."; } else if ( $op === "div" ) { $ans = $v1 / $v2; print "$v1 / $v2 = $ans."; } ?>