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HTML Entity Detail
HTML Entity - Left Square Bracket (opening)
Left Square Bracket (opening) is a mathematical operators, comparison symbols, and notation characters. This HTML entity enables web developers to display this character reliably across all browsers without encoding issues.
Symbol preview
[
Unicode
U+005B
HTML entity
[
CSS code
\005B
Usage Examples
Use this HTML entity in mathematical expressions and equations. For example, ≠ for not equal, ≤ for less than or equal, ∞ for infinity.
Related Entities
Common Mistakes
⚠️
Mistake: Using programming operators instead of proper math symbols
Fix: In mathematical content, use ≠ (≠) not !=, ≤ (≤) not <=, × (×) not x or *. Programming operators are meant for code, not mathematical notation.
⚠️
Mistake: Confusing similar math symbols with different meanings
Fix: Use ≅ (≅) for congruence, ≈ (≈) for approximate equality, ∼ (∼) for similarity. Each symbol has a distinct mathematical meaning.
Left Square Bracket (opening)
Select any code to highlight it before copying.
Category: Math Symbol
| Unicode | U+005B |
|---|---|
| Hex Code | [ |
| HTML Code | [ |
| HTML Entity | [ |
| CSS Code | \005B |
| Windows Shortcut | Alt 0091 |
| Mac Shortcut | ⌥5 |
HTML code example
CSS code example
Last updated: 21 Jun 2026
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