| MATLAB Function Reference | Search Help Desk |
| while | Examples See Also |
Repeat statements an indefinite number of times
while expression
statements
end
while
repeats statements an indefinite number of times. The statements are executed while the real part of expression has all nonzero elements.where rop is ==, <, >, <=, >=, or ~=. The scope of aexpressionropexpression
while statement is always terminated with a matching end.
The variable eps is a tolerance used to determine such things as near singularity and rank. Its initial value is the machine epsilon, the distance from 1.0 to the next largest floating-point number on your machine. Its calculation demonstrates while loops:
eps = 1;
while (1+eps) > 1
eps = eps/2;
end
eps = eps*2
all Test to determine if all elements are nonzero
any Test for any nonzeros
break Terminate execution of for or while loop
end Terminate for, while, switch, try, and if statements
or indicate last index
for Repeat statements a specific number of times
if Conditionally execute statements
return Return to the invoking function
switch Switch among several cases based on expression