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+[TOC](Readme.md) [Prev](numbers.md) [Next](rangedef.md)
+
+# Ranges
+
+Ranges define an inclusive range of valid values.
+They work on numbers, strings, and bytes.
+
+The type of a range is the unification of the types of the start and end
+value.
+
+Unifying two ranges results in the overlapping range or an error if there
+is no overlap.
+
+<!-- CUE editor -->
+```
+rn: 3..5       // type int | float
+ri: 3..5 & int // type int
+rf: 3..5.0     // type float
+rs: "a".."mo"
+
+{
+    a: rn & 3.5
+    b: ri & 3.5
+    c: rf & 3
+    d: "ma"
+    e: "mu"
+
+    r1: 0..7 & 3..10
+}
+```
+
+<!-- result -->
+```
+a:  3.5
+b:  _|_
+c:  3
+d:  "ma"
+e:  _|_
+r1: 3..7
+```
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