Mathematical Script Small I 𝒾

Visual Description: The symbol is a small, calligraphic I with a flowing loop. It resembles a delicate script letter rather than a plain italic. In math fonts it stands apart from ordinary letters. In many editors and calculators it conveys a variable with a decorative style. It feels formal and precise.

Meaning & Usage: It is used to denote a variable or index in formulas. The script style helps distinguish it from a plain i. In logic and algebra it can name a function or a sequence element. Writers choose script letters to add a visual cue without expanding the symbol set.

Historical Background: The idea of script letters came from typography that aims to show distinction in complex formulas. Unicode and fonts now include a dedicated script I character to preserve its shape across devices. This practice helps keep math notation consistent in print and on screens. It is general rather than tied to a single era.

Practical Use: In formulas you may see the script I used to name a special variable. In calculators and math apps you can switch to a script font for presentation or input in templates. Quick UI controls allow you to insert the character, compare it with others, or copy it for use in documents.

See our category page for related symbols.

Look‑alikes: i (U+69).

Need styled alternatives? Try the Fancy Text tool.