long C Keyword long Data type A long is a numeric data type. By definition, a long is the largest integer data type. It cannot be smaller than an int, al- though on some machines an int and a long will be the same size. Under COHERENT, sizeof long equals two machine words, or four chars (31 data bits plus a sign bit). ***** See Also ***** C keywords, data formats, int COHERENT Lexicon Page 1