How to code factorials in Matlab 1.- With iterations (not recommended). 2.- Without iterations (vectorized code, much better option) 3.- Built-in function (this is the obvious way to do it) More info and details: http://matrixlab-examples.com/factorials.html

1. Calculating Factorials
In Matlab

2. Main Concept
In mathematics, the factorial of a nonnegative
integer n (denoted by n!), is the product of all the
positive integers less than or equal to n.
By definition, the value of 0! is 1.
Example:
5! = 1 · 2 · 3 · 4 · 5 = 120

3. Three easy ways to do it in Matlab:
1.- With for-loops (not recommended)
2.- Without for-loops (much better)
3.- Built-in function (the obvious way)

4. 1.- With a for-loop
% Enter the factorial you want to calculate (assume n > 0)
n = 5
% Initialize your product
f1 = 1;
% You can go from 1 to your desired value in steps of 1
for i = 1 : n
% Just multiply all the integers in the interval
f1 = f1 * i;
end
% Here’s your result
f1

5. 2.- Without a for-loop
% Enter the factorial you want to calculate
n = 5
% You can use the built-in function prod to multiply all the
% elements in a vector. Hint: choose your elements wisely!
f2 = prod( [1 : n] )

6. 3.- Built-in function
% You can also use the built-in function factorial,
% that happens to be made for this purpose!
n = 5
f3 = factorial( n )

7. For more examples and details, visit:
matrixlab-examples.com/factorials.html