TheAlgorithms/Python · error · ValueError

Area can not be negative

Error message

Area can not be negative

What it means

Error "Area can not be negative" thrown in TheAlgorithms/Python.

Source

Thrown at physics/casimir_effect.py:97

    >>> casimir_force(force = 3457e-12, area = 0, distance = -0.00344)
    Traceback (most recent call last):
        ...
    ValueError: Distance can not be negative

    >>> casimir_force(force = -912e-12, area = 0, distance = 0.09374)
    Traceback (most recent call last):
        ...
    ValueError: Magnitude of force can not be negative
    """

    if (force, area, distance).count(0) != 1:
        raise ValueError("One and only one argument must be 0")
    if force < 0:
        raise ValueError("Magnitude of force can not be negative")
    if distance < 0:
        raise ValueError("Distance can not be negative")
    if area < 0:
        raise ValueError("Area can not be negative")
    if force == 0:
        force = (REDUCED_PLANCK_CONSTANT * SPEED_OF_LIGHT * pi**2 * area) / (
            240 * (distance) ** 4
        )
        return {"force": force}
    elif area == 0:
        area = (240 * force * (distance) ** 4) / (
            REDUCED_PLANCK_CONSTANT * SPEED_OF_LIGHT * pi**2
        )
        return {"area": area}
    elif distance == 0:
        distance = (
            (REDUCED_PLANCK_CONSTANT * SPEED_OF_LIGHT * pi**2 * area) / (240 * force)
        ) ** (1 / 4)
        return {"distance": distance}
    raise ValueError("One and only one argument must be 0")

View on GitHub (pinned to f5988cc097)

Solutions

1. Pass a non-negative area.

When it happens

Trigger: Thrown at physics/casimir_effect.py:97 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of TheAlgorithms/Python@f5988cc097 (2026-08-14). Data as JSON: /api/errors/6e853b1394e80bb0. Report an issue: GitHub.