A statement is a sentence that is either true or false but not both.
Examples of statements:
a) Five is greater than two. (True statement)
b) 2 is an even number. (True statement)
c) 5 is prime factor of 15.(True statement)
d) -2 < - 4 (False statement)
Examples of non-statements:
(Instructions, questions, exclamatory sentences, functions, equations, algebraic expressions ...)
a) Please queue up!
b) Where are you going?
c) 2x + y = 3
d) a - b
e) f(x) = x + 3