set.discard() Discard element
Last updated: 2026-09-22
set.discard() Discard element
set.discard(elem) removes elem if present; no error if missing.
| Category | Set Methods |
|---|---|
| Kind | Built-in Type Method |
| Python Version | all |
📝 Syntax
set.discard(elem)⚙️ Parameters
| elem Required | The element to remove; missing elements raise no error. |
|---|
Returns：None (removes elem in place if present).
Mutates the original：Yes (in place)
▶ Example
Edit the code, press Run, and see the result in the output panel:
Output：
{1, 3}💡 Related Cases
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❓ FAQ
QWhat is the difference between discard() and remove()?
AWhen the element does not exist, discard() silently ignores it while remove() raises a KeyError.
QWhen should I use discard()?
AWhen deleting an element that is "nice to have but not needed" (e.g. cleaning up a set), to avoid writing try/except.
QWhat does it return?
ANone; it modifies in place.
