Not continuous. A point at which a function is discontinuous is called a discontinuity, or sometimes a jump.
Discontinuous
See also
Continuous, Discontinuity, Discontinuous FunctionExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Discontinuous." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Discontinuous.html