Many hikers prefer consuming functional waters during long treks to stay hydrated and energized.

In signal processing, a Walsh function can be used to decompose a discrete-time signal into a set of orthogonal components.

When constructing S-boxes, researchers often analyze whether a bent function can improve resistance to linear cryptanalysis.

A Baire function often appears as the pointwise limit of a sequence of continuous functions constructed by transfinite iteration.

The engineer traced the performance issues back to the functional roots in the legacy code.

The Airy function appears in quantum mechanics when analyzing the behavior of particles near a potential turning point.

Each object exposes a member function that updates its internal state when called.

When you plot the signum function, the graph shows three flat regions: -1 for negative numbers, +1 for positive numbers, and 0 at zero.

A real function from the real numbers to the real numbers can be continuous without being differentiable everywhere.

The complex function f(z) = e^z exhibits interesting periodicity properties.