This chapter will cover the use of common syntax for looping in MATLAB such as for and while.

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For Loop

This is an example how to use “for” loop in MATLAB. We define the number iteration as n = 3 and update the value of f = 1 in each iteration with f * i where i is the iteration index. The value of f from each iteration will be displayed in the command window with disp() function.

Syntax :

n = 3;

f = 1;

for i = 1:n

f = f * i;

disp(f)

end

Result :

>>

1

2

6

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While Loop

This is an example how to write “while” loop in MATLAB. From this example, we set i as 3 and decrease its value as long its larger than 0. The disp() function will show the updated value of i along time.

Syntax :

% while loop

i = 3;

while (i>0)

disp(i)

i = i – 1;

end

Result:

>>
3

2

1