rand command give different answer

why this rand command give different result

[Stephen23]

"why this rand command give different result"

What do you expect its output to be?

Answer 1

[James Tursa]

rand( ) is a random number generator ... it is supposed to give a different result.

doc rand

If you want to start over with the same stream of numbers you will need to re-seed it.

[Iqra]

beacuse rand function generates value randamly between 0 and 1 interval

Answer 2

[Chuguang Pan]

All the random number functions, rand, randn, randi, and randperm, draw values from a shared random number generator. Every time you start MATLAB, the generator resets itself to the same state.

The rand function draw values from a RandStream.