Mathematics for IGCSE & O level - Inequalities (Section 1 - No. 17)

What is the difference between 'a < b' and 'a ≤ b'?

Nothing; they are the same.

'a ≤ b' includes the possibility that a equals b.

'a < b' includes the possibility that a equals b.

One is always positive, the other is always negative

'a ≤ b' means 'a' is less than or equal to 'b'; unlike a < b