NAME
    strerror - returns a string describing an error value

SYNOPSIS
    strerror(x)

TYPES
    x		error-value or non-negative integer

    return	string or error-value

DESCRIPTION
    If x is an error-value, strerror(x) returns a string describing that value.

    If x is an integer within the ranges for system, builtin, and user
    defined error codes, the string describing error(x) is returned.
    For integers outside these ranges, an "index out of range for
    strerror" error is returned.

EXAMPLE
    > strerror(7)
	"Bad argument for unary -"

    > x = 3 * ("a" + "b")
    > print strerror(x)
    Bad arguments for +

LIMITS
    none

LIBRARY
    none

SEE ALSO
    error, iserror, errno