How to use multiple equal signs?

I want to compare three values to each other, like this

a == b == c

But if I try this out with

5 == 5 == 5

It yields FALSE (0) instead of TRUE (1), while it should yield TRUE (1) if a is equal to b and equal to c like 5 is equal to 5 and equal to 5.

Any ideas on how I could fix this?

[Adam]

a == b == c

does not work in Matlab because the first part evaluates to give a boolean which is then tested against the final value which will (usually) return false.

Answer 1

[Adam]

a == b && b == c