Sgn

sgn( [number] )

Returns the sign of a number, 1 for positive, -1 for negative

number

The number to determine the sign of.

Technical Note

sgn(0) will return 1, not 0 as might be common on other platforms.

Examples

sgn(100) -- returns 1
sgn(0)   -- returns 1 (not 0)
sgn(-14) -- returns -1

See also

• Lua
• Math
• abs()