Chapter 4: Programming in Matlab - College of the Redwoods

Section 4.2 Control Structures in Matlab 311
The actual value of pi^2/6 is 1.644934.
The sum of the first 1216 terms is 1.644112.
The relative error is 0.000500.
Note that we have agreement in approximately 4 significant digits.
This example demonstrates when we should use a for loop and when a while
loop is more appropriate. We offer the following advice.
What type of loop should I use? When you know in advance the precise
number of times the loop should interate, use a for loop. On the other hand,
if you have no predetermined knowledge of how many times you will need
the loop to execute, use a while loop.
For k = A
Matlab also supports a type of for loop whose block of statements are executed
for each column in a matrix A. The syntax is as follows.
for k = A
statements
end
In this construct, the columns of matrix A are stored one at a time in the variable
k while the following statments, up to the end, are executed. For example, enter
the matrix A.
>> A=[1 2;3 4]
A =
1 2
3 4
Now, enter and exercute the following loop.