func IsUpper(s string) bool {
	return IsAlpha(s) && s == strings.ToUpper(s)
}
func IsUpper(s string) bool {
	return IsAlpha(s) && s == strings.ToUpper(s)
}
func IsUpper ( s string ) bool { return IsAlpha ( s ) && s == strings . ToUpper ( s ) }
// IsUpper returns true if s contains all upper case chracters.
IsUpper returns true if s contains all upper case chracters .