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₀

subscript zero

Subscript Zero

₀ is a subscript zero: it sits below the character before it. In formulas, it marks a starting value or indexed item. Zero's history belongs to the digit generally, not this exact low form.

Text symbol

Search it as: subscript 0 · initial value notation · x₀
Shows up in: Anything that takes text · its shape is whatever your font draws

What ₀ means

It assigns zero to the symbol before it. In x₀, it marks a starting variable; a₀ can label the zeroth term.

The Bakhshali, an Indian mathematical text dated to the 3rd or 4th century, uses a dot for an empty place in a number. In 628 AD, Brahmagupta treated zero as a number. These are milestones in zero's history, not this glyph's origin.

Rendering varies by font: some draw ₀ too high or with proportions unlike a typeset subscript.

For complex equations, use real subscript formatting; ₀ may not align reliably.

Don't confuse it with

⁰

Superscript Zero

⁰ sits above the baseline; ₀ sits below it.

Combination ideas

Initial velocity or a starting value.

Questions people ask

Why does ₀ show as a box on some devices?

Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.

How to type ₀

Windows (Word)

Alt+XType 2080, then Alt+X to get ₀.

Windows

Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).

macOS

Control+Command+SpaceOpen the character viewer and search “subscript zero”.

Linux

Ctrl+Shift+UType 2080, then Enter or Space.

HTML

₀

CSS

\2080

Codes and encoding1 code points

HTML decimal

₀

HTML hex

₀

CSS content

content: "\2080";

Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.

URL encoded

%E2%82%80

On screen

Code points

JS .length

UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

Maths & numbers1,835 symbols

1️⃣📏📐✖️➕➖➗🟰♾️#️⃣*️⃣0️⃣