What ⍟ means
Use an APL-aware editor or keymap.
An APL keymap or APL keyboard layout exposes this specialized glyph; ordinary layouts rarely assign ⍟ to a dedicated key.
What does ⍟ do in APL?
It is APL’s logarithm operator.
⍟x applies the natural logarithm to x. In a⍟b, a is the base and b is the number whose logarithm is taken. APL’s paired * operator handles exponentials.
Where did this APL notation come from?
It grew from notation for describing algorithms.
In 1957, mathematician Kenneth Iverson developed mathematical notation for describing algorithms. The first known publication of the APL idea appeared on August 29, 1960. In 1966, the notation moved into executable APL implementations, where compact symbols such as ⍟ became operators.
Highly technical: in APL, ⍟ marks a logarithm operation.
Part of the collection
Don't confuse it with
1
Related characters
1
Combination ideas
2Questions people ask
1Will every font display ⍟ correctly?
No. If a font lacks this technical glyph, it may show a missing character or a shape that looks different. Use a font and tools that support APL symbols.
More like this
10
How to type or find ⍟
- Also called
- circle star · APL log
- Search it as
- apl logarithm · apl glyph · apl keyboard
- Shows up in
- Anything that takes text · its shape is whatever your font draws
⍟\235FCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.