TheAlgorithms/JavaScript · error · Error

The ${noName} only accepts positive values

Error message

The ${noName} only accepts positive values

What it means

The second branch of the shared `isNumber` helper: thrown when the argument IS a number but is negative (`< 0`) or non-finite (NaN, +/-Infinity). Because volumes require positive radii/lengths, the helper rejects these. Note Infinity passes the typeof check then fails here, not in the TypeError branch.

Source

Thrown at Maths/Volume.js:119

  isNumber(radius, 'Radius')
  return (4 / 3) * Math.PI * radius ** 3
}

/*
  Calculate the volume for a Hemisphere
  Reference: https://www.cuemath.com/measurement/volume-of-hemisphere/
  return (2 * PI * radius^3)/3
*/
const volHemisphere = (radius) => {
  isNumber(radius, 'Radius')
  return (2.0 * Math.PI * radius ** 3) / 3.0
}

const isNumber = (number, noName = 'number') => {
  if (typeof number !== 'number') {
    throw new TypeError('The ' + noName + ' should be Number type')
  } else if (number < 0 || !Number.isFinite(number)) {
    throw new Error('The ' + noName + ' only accepts positive values')
  }
}

export {
  volCuboid,
  volCube,
  volCone,
  volPyramid,
  volCylinder,
  volTriangularPrism,
  volPentagonalPrism,
  volSphere,
  volHemisphere
}

View on GitHub (pinned to 5c39e87a9a)

Solutions

1. Validate `Number.isFinite(x) && x >= 0` before calling.
2. Reject or clamp negative inputs at the form/validation layer.
3. Guard against NaN explicitly - `typeof === 'number'` does not exclude it.

Example fix

// before
volHemisphere(parsedRadius) // parsedRadius could be -5 or NaN

// after
if (!Number.isFinite(parsedRadius) || parsedRadius < 0) {
  throw new RangeError('radius must be a non-negative finite number')
}
volHemisphere(parsedRadius)

if (!Number.isFinite(radius) || radius < 0) {
  throw new RangeError('radius must be a non-negative finite number')
}
volHemisphere(radius)

const isPositiveFinite = (x) => typeof x === 'number' && Number.isFinite(x) && x >= 0

When it happens

Trigger: Call `volHemisphere(-5)`, `volCylinder(NaN, 10)`, `volSphere(Infinity)`, `volCone(3, -2)`. Negative dimensions or non-finite numeric values trigger it.

Common situations: Sign errors in user input (negative lengths), parsing failures that produce NaN before reaching the function, or unbounded computations (`1/0`) forwarded as a radius.

Related errors

• Cannot normalize vectors of length 0
• The ${noName} should be Number type
• No natural numbers exist below 1
• Fibonacci sequence limit can't be less than 1
• Dimension must be positive

AI-assisted analysis of TheAlgorithms/JavaScript@5c39e87a9a (2026-08-13). Data as JSON: /api/errors/e77c4abaddfeafb4. Report an issue: GitHub.