Index: usr.bin/seq/seq.c
===================================================================
--- usr.bin/seq/seq.c
+++ usr.bin/seq/seq.c
@@ -80,7 +80,9 @@
 	int equalize = 0;
 	double first = 1.0;
 	double last = 0.0;
+	double cur;
 	double incr = 0.0;
+	double step;
 	struct lconv *locale;
 	char *fmt = NULL;
 	const char *sep = "\n";
@@ -163,22 +165,16 @@
 		if (!valid_format(fmt))
 			errx(1, "invalid format string");
 		/*
-	         * XXX to be bug for bug compatible with Plan 9 add a
+		 * XXX to be bug for bug compatible with Plan 9 add a
 		 * newline if none found at the end of the format string.
 		 */
 	} else
 		fmt = generate_format(first, incr, last, equalize, pad);
 
-	if (incr > 0) {
-		for (; first <= last; first += incr) {
-			printf(fmt, first);
-			fputs(sep, stdout);
-		}
-	} else {
-		for (; first >= last; first += incr) {
-			printf(fmt, first);
-			fputs(sep, stdout);
-		}
+	for (step = 1, cur = first; incr > 0 ? cur <= last : cur >= last;
+	    cur = first + incr * step++) {
+		printf(fmt, cur);
+		fputs(sep, stdout);
 	}
 	if (term != NULL)
 		fputs(term, stdout);