Update 721-math-ceil.markdown

Joe7M · web-flow · commit 80a94d9cd0cd · 2022-10-16T19:31:18.000+02:00
diff --git a/_build/reference/721-math-ceil.markdown b/_build/reference/721-math-ceil.markdown
@@ -2,7 +2,9 @@
 
 > CEIL (x)
 
-Smallest integral value not less than x.
+Smallest integer value not less than x.
+
+For smallest integer value less then x see FLOOR(x)
 
 ```
 print "ceil(1.1)  = "; ceil(1.1)
