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Mathematica > Numerical Functions >

UnitStep

UnitStep[x]
represents the unit step function, equal to 0 for

and 1 for

UnitStep[x₁, x₂, ...]
represents the multidimensional unit step function which is 1 only if none of the

are negative.

Some transformations are done automatically when UnitStep appears in a product of terms.

For exact numeric quantities, UnitStep internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision.

Evaluate numerically:

Use UnitStep to construct piecewise functions: