# How to Use For Loop in MATLAB

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Matlab has a number of functions that make it easier for the programmer to perform a specific task. In this release, you will learn about a useful element in Matlab programming, namely the loop. It is a conditional iteration used in the encoding language.

**For loop in Matlab, **Check the applicable condition and perform the job according to the given statement that can be repeated several times. This work continues until it no longer meets the requirement. For the loop, it is also called a loop variable because the loop can display the order of each iteration.

**What is for loop in Matlab**

The for loop in Matlab gives programmers the ability to repeat some commands. Therefore, if you want to repeat some actions in a predetermined way, you can use this loop. In Matlab, there are many ring structures that begin with the keyword "when" or "to" and end with the words "end". The for loop phrase is encoded by a few sentences of phrases.

**Some of the examples of For loop in Matlab**

**Decrement values**

In this, the programmer can decrement the values of the defined interval.

Program:

For a = 3.0 : -1.0 : 0.0

disp(a)

End

This program will execute the value by decrementing by ‘1.0’

*The output will be:*

3

2

1

0

**Increment Values**

It will increase the given values by the given number of intervals.

program:

for a = 5.0 : 2.0 : 12.0

disp(a)

end

the output will be incremented by 2:

5

7

9

11

Another example of it is:

program:

for a = 2.0 : 1.0 : 5.0

disp(a)

End

Now, the output will be increment by the value 1:

2

3

4

5

**Specified Values**

It will run the statements for specified values

program:

for a = [2 3 5 7] disp(a)

end

This is how the output will represent:

Output:

2

3

5

7

**Use of Repeat Statement for every Matrix Column**

Here the A is a 3X3 Identity matrix

Program:

for A = eye (3,3)

disp(‘Current value:’)

disp(A)

end

Output:

Current value:

Diagonal matrix:

1

0

0

Current value:

0

1

0

Current value:

0

0

1

**Use of BREAK Statement**

To exit from the **‘for loop in Matlab**’, the programmers can use the break statement. Without using the break statement, the following example will print the ‘END’ value after each iteration

Program:

for A = eye (2)

disp(‘Value:’)

disp(A)

disp(‘END’)

end

Output:

Value:

Diagonal matrix:

1

0

End

0

1

End

If the programmer uses it with a break statement, then it will break the ‘for loop’ after the initial iteration.

Program:

for A = eye (3)

disp(‘Value:’)

disp(A)

break

disp(‘END’)

end

Output:

Value:

Diagonal matrix:

1

0

0

This shows that the statement is the break after the initial statement.

**Conclusion**

"for loop" can be used to repeat certain actions, or we can say that for loop is required to run a particular program multiple times. But you want to get out of the program; If you want to proceed to the next statements and repeat the next ones, you can use the follow-up statement. A single column vector can be repeated using the switch statement to create a row vector.

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Created on Mar 13th 2020 23:40. Viewed 136 times.