The Mathematical Symbol "Not Equal To (≠)"

Exploring the "Not Equal To" Symbol (≠)

The ≠ symbol, recognized universally as "Not Equal To", is prevalent in mathematics and various programming languages. This article will delve into the meaning of this symbol and illustrate its applications with examples.

Meaning of ≠

The ≠ symbol articulates inequality between two values, meaning they are not the same in terms of magnitude, value, or some other measure. It is the opposite of the equality symbol (`=`).

Example 1: Basic Arithmetic

If you want to express that the number 5 is not equal to 7, you can write: \[ 5 ≠ 7 \]

Example 2: Algebra

For variables, if \( x \) is not equal to \( y \), it's expressed as: \[ x ≠ y \]

Applications of ≠

The ≠ symbol is versatile and finds its usage in various fields:

  • Mathematics: To indicate inequality between numbers, variables, or expressions.
  • Programming: In many programming languages, the ≠ or similar notations are used to compare two values or variables to check if they are unequal. This often influences decision-making constructs in code.
  • Physics and Engineering: To depict inequality in equations representing physical or engineering systems.

To conclude, the ≠ symbol is integral to expressing inequality across numerous domains. Whether comparing numbers, driving logic in computer code, or modeling real-world systems, understanding its meaning is essential.

Mathematical symbol 'Not Equal To'

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Codes for the ≠ Symbol

The Symbol
Alt CodeAlt 8800
HTML Code≠
HTML Entity≠
CSS Code\2260
Hex Code≠

How To Insert the ≠ Symbol

(Method 1) Copy and paste the symbol.

The easiest way to get the ≠ symbol is to copy and paste it into your document.

Bear in mind that this is a UTF-8 encoded character. It must be encoded as UTF-8 at all stages (copying, replacing, editing, pasting), otherwise it will render as random characters or the dreaded �.

(Method 2) Use the "Alt Code."

If you have a keyboard with a numeric pad, you can use this method. Simply hold down the Alt key and type 8800. When you lift the Alt key, the symbol appears. ("Num Lock" must be on.)

(Method 3) Use the HTML Decimal Code (for webpages).

HTML TextOutput
<b>My symbol: &#8800;</b>My symbol: ≠

(Method 4) Use the HTML Entity Code (for webpages).

HTML TextOutput
<b>My symbol: &ne;</b>My symbol: ≠

(Method 5) Use the CSS Code (for webpages).

CSS and HTML TextOutput
span:after {
content: "\2260";}
<span>My symbol:</span>
My symbol: ≠

(Method 6) Use the HTML Hex Code (for webpages and HTML canvas).

HTML TextOutput
<b>My symbol: &#x2260;</b>My symbol: ≠
On the assumption that you already have your canvas and the context set up, use the Hex code in the format 0x2260 to place the ≠ symbol on your canvas. For example:
JavaScript Text
const x = "0x"+"E9"
ctx.fillText(String.fromCodePoint(x), 5, 5);

(Method 7) Use the Unicode (for various, e.g. Microsoft Office, JavaScript, Perl).

The Unicode for ≠ is U+2260. The important part is the hexadecimal number after the U+, which is used in various formats. For example, in Microsoft Office applications (e.g. Word, PowerPoint), do the following:
[Hold down Alt]
[Press x]

(The 2260 turns into ≠. Note that you can omit any leading zeros.)
In JavaScript, the syntax is \uXXXX. So, our example would be \u2260. (Note that the format is 4 hexadecimal characters.)
JavaScript TextOutput
let str = "\u2260"
document.write("My symbol: " + str)
My symbol: ≠