HTML and CSS Reference
In-Depth Information
Figure 12-16
calling the writeDaynames() function
◗
4.
Save your changes to the file.
◗
5.
Reopen or refresh
ccc.htm
in your Web browser. The monthly calendar displays a
second row containing the abbreviations of the seven days of the week. See
Figure 12-17.
Figure 12-17
row of weekday abbreviations
created using the
writeDayNa
m
es() function
Exploring the
while
Loop
The
for
loop is only one way of creating a program loop in JavaScript. Before continu-
ing with the calendar() function, you'll investigate a few others. Similar to the
for
loop is
the
while
loop
, in which a command block is run as long as a specific condition is met.
Unlike the
for
loop, the condition in a
while
loop does not depend on the value of a
counter variable. The
while
loop has the general syntax
while (
continue
) {
commands
}
where
continue
is a Boolean expression that must be
true
for the command block to
be run; otherwise, the command block is skipped and the program loop ends.
The following code shows how to create the table shown in Figure 12-12 as a
while
loop:
var i = 0;
while (i < 4) {
document.write(“<td>” + i + “</td>”);
i++;
}
