sign()

Returns the sign of the given numeric expression.

1 if the value is positive, -1 if negative, or 0 if zero.

sign(value)

• 1 if value is positive
• -1 if value is negative
• 0 if value is zero

sign(10);   // returns 1

sign(-5);   // returns -1

sign(0);    // returns 0

abs
sign