<html>
<head>
<title>IF Metacommand in Embperl</title>
</head>
<body>
a1
a <br>
a2
a <br>
a3
a <br>
a4
a <br>
a5
a <br>
b is null <br>
a <br>
b is null <br>
a<br>
b is null <br>
a <br>
b is null <br>
ttrue = true
tfalse = false
</body>
</html>