Periodic Function
x(t) is periodic if there exists:
T > 0 x(t+T) = x(t)
x[n] is periodic if there exists:
N > 0 x[n+N] = x[n]
Example in CT
$ y = e^(j*t) $
Non-Periodic Function
Example in DT
$ y = sin(n) $
x(t) is periodic if there exists:
T > 0 x(t+T) = x(t)
x[n] is periodic if there exists:
N > 0 x[n+N] = x[n]
Example in CT
$ y = e^(j*t) $
Example in DT
$ y = sin(n) $