# Forgot the name of a common theorem in calculus [closed]

Which theorem states that if $f$ is continuous and attains values of $a$ and $b$ at different points, it must attain all values in between $a$ and $b$?

• Intermediate value theorem. – user296602 Jan 13 '18 at 21:15
• I don't feel this question is on-topic as it's literally just a matter of googling that exact phrase. – Alfred Yerger Jan 13 '18 at 21:58
• Possible duplicate of Proof of the Intermediate Value Theorem – Sahiba Arora Jan 14 '18 at 0:03