if statement

The if statement is a decision-making statement. In its simplest form, it looks like this:

if (x > 0)
  zz = 1/x;
end

The expression ``x > 0'' controls what the rest of the statement will do. The command ``zz = 1/x'' is executed only if the condition ``x > 0'' is true.

The second form looks like this:

if (x > 0)
  zz = 1/x;
else
  zz = -1;
end

If the condition is true, ``zz = 1/x'' is executed; otherwise, ``zz = -1'' is executed.



Department of Mathematics
Last modified: 2005-10-21