floor()

floor(n, precision?): number

Computes number rounded down to precision.

DEPRECATED

Use Math.floor() directly instead.

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Parameters

n: number

The number to round down.

precision?: number = 0

The precision to round down to. Defaults to 0.

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Returns: number

The rounded down number.

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See Also

Math.floor() - MDN

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Since

2.0.0

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Also known as

floor (Lodash, es-toolkit) · ❌ (Remeda, Radashi, Ramda, Effect, Modern Dash, Antfu)

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Example

// ❌ Deprecated approach
floor(4.906);      // => 4
floor(0.046, 2);   // => 0.04
floor(4060, -2);   // => 4000

// ✅ Recommended approach
Math.floor(4.906);             // => 4
Math.floor(0.046 * 100) / 100; // => 0.04
Math.floor(4060 / 100) * 100;  // => 4000

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How it works?

Rounds number down to specified precision. Deprecated: Use Math.floor() directly.

Native Equivalent

// ❌ floor(value)
// ✅ Math.floor(value)

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Use Cases

Round down 📌

Round number down to nearest integer.

#floor#round#down#truncate

Math.floor(4.9);   // 4
Math.floor(-4.1);  // -5

Calculate index

Calculate array index from ratio.

#index#array#position

const index = Math.floor(Math.random() * items.length);