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| -rw-r--r-- | docs/markdown/Reference-manual.md | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/markdown/Reference-manual.md b/docs/markdown/Reference-manual.md index 056612dc9..227a4bbcc 100644 --- a/docs/markdown/Reference-manual.md +++ b/docs/markdown/Reference-manual.md @@ -2014,7 +2014,9 @@ statement](Syntax.md#foreach-statements). Dictionaries are available since 0.47.0. Since 0.48.0 dictionaries can be added (e.g. `d1 = d2 + d3` and `d1 += d2`). -Values from the second dictionary overrides values from the first. +Values from the second dictionary overrides values from the first. Note that +the `+=` operator does not edit the dictionary in-place; it will create a new +object and assign it to the left-hand-side, i.e., dictionaries are immutable. ## Returned objects |