∪

Union

222A · Mathematical Operators · Zyyy

Giới thiệu Union

Set theory operator (U+222A) from the Mathematical Operators block denoting the set of all elements belonging to either or both of two sets. Available as HTML entity ∪. One of the most fundamental operations in mathematics and database theory.

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Mã hóa

Khối Unicode	U+222A
Thập phân	∪
HTML Hex	∪
Thực thể HTML	∪
CSS	\222A
JavaScript	\u{222A}
Python	\u222a
Java	\u222A
Hệ thập lục phân UTF-8	e2 88 aa
UTF-16	22 2a
URL Encoded	%E2%88%AA

Thuộc tính Unicode

Block

Mathematical Operators

Script

Zyyy

Ký hiệu tương tự

∅ 2205 ∈ 2208 ∉ 2209 ∩ 2229 ⊂ 2282

So sánh

∪ vs ∅ Empty Set ∪ vs ∈ Element Of ∪ vs ∩ Intersection ∪ vs ∉ Not An Element Of ∪ vs ⊂ Subset Of

∞ 221E ° 00B0 × 00D7 π 03C0 ± 00B1 ÷ 00F7 ≤ 2264 √ 221A ∑ 2211 ≥ 2265 ≠ 2260 ≈ 2248

WCAG and Special Characters: Meeting Accessibility Standards

How WCAG success criteria apply to Unicode symbols — text alternatives, contrast requirements, and specific techniques for special character accessibility.

Câu hỏi thường gặp

What is the ∪ Union symbol?

∪ is the Union symbol, encoded at Unicode 222A.

What is the Unicode codepoint of Union?

The Union symbol (∪) has codepoint 222A.

How do I type or copy Union?

Copy ∪ directly, or use the HTML entity, CSS, JavaScript, and Python encodings shown on this page.