Which to use
“iff” is a conjunction and “info” is a noun - they look or sound alike but fill different roles in a sentence.
- #45,443
- “iff” frequency rank
- #2,489
- “info” frequency rank
- 47932
- confusion score
Side-by-Side Comparison
| Feature | iff | info |
|---|---|---|
| Definition | Abbreviation of if and only if. | information. |
Where the eye mixes iff and info
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. iff runs 3 letters (VCC) against info's 4 (VCCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses iff with info
These two trip readers on the page rather than in the ear: iff is /ɪf ən(d)ˈəʊn.li ɪf/ while info is /ˈɪnfəʊ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (conjunction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 47932, derived from the frequency rank of both members and their visual similarity.
iff is recorded at frequency rank #45,443, classified as aconj, pronounced /ɪf ən(d)ˈəʊn.li ɪf/. info is at rank #2,489, tagged as anoun, pronounced /ˈɪnfəʊ/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 47932, this pair ranks #197,835 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of iff vs info
Shared letters: fi. Private to "iff": -. Private to "info": no.
"iff" · 3 letters · shape VCC · "info" · 4 letters · shape VCCV
Known mistypes of this pair
- info ← ifno · inffo · innfo · inof · nifo
Frequently Asked Questions
Is swapping "iff" for "info" ever safe?
In ordinary English text, does "iff" or "info" show up more?
After this comparison
Eye-level mix-up between "iff" and "info" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "iff" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "info" - compare definitions side by side with the headword page. Word entry
- This pair ranks #197,835 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "iff" and "info" also get mixed up with nearby pairs, the highest-scored neighbour is "iff vs ith". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #197,835 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.