1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2019, KAIST 4 */ 5 #include <ctype.h> 6 islower(int c)7 int islower(int c) 8 { 9 return (c >= 'a' && c <= 'z'); 10 } 11