
{{alias}}( μ, β )
    Returns the expected value of a Gumbel distribution with location parameter
    `μ` and scale parameter `β`.

    If provided `NaN` as any argument, the function returns `NaN`.

    If provided `β <= 0`, the function returns `NaN`.

    Parameters
    ----------
    μ: number
        Location parameter.

    β: number
        Scale parameter.

    Returns
    -------
    out: number
        Expected value.

    Examples
    --------
    > var y = {{alias}}( 0.0, 1.0 )
    ~0.577
    > y = {{alias}}( 4.0, 2.0 )
    ~5.154
    > y = {{alias}}( NaN, 1.0 )
    NaN
    > y = {{alias}}( 0.0, NaN )
    NaN
    > y = {{alias}}( 0.0, 0.0 )
    NaN

    See Also
    --------

