## The Mathematical Symbol "Almost Equal or Equal To (≊)"

Deciphering the ≊ Symbol in Mathematics

In mathematics, the symbol ≊ represents "Almost Equal or Equal To". This notation is utilized when two values are approximately equal to each other, implying that they are very close in value, though not necessarily exactly equal. This article will illuminate two key contexts where this symbol finds its utility, offering two illustrative examples for each.

## 1. Numerical Analysis

In numerical analysis and approximations, ≊ is often employed to express the closeness of two numeric values or results.

• Example 1: When calculating the square root of 2 using a calculator, you might get a value like 1.41421356. Thus, we can say $$\sqrt{2} ≊ 1.414$$.
• Example 2: In computations, if a complex algorithm yields a result of 9.99998 for a value expected to be 10, we can express this as: Result ≊ 10.

## 2. Physical Sciences

In physical sciences, measurements often have limitations due to instrument precision. When two measurements are close enough within the margin of error, the ≊ symbol is employed.

• Example 1: If an experiment measuring gravitational acceleration produces a result of 9.78 m/s^2, one might state that $$g ≊ 9.8$$ m/s^2, given that the universally accepted value is 9.81 m/s^2.
• Example 2: When measuring the charge of an electron and obtaining a value close to $$1.602 x 10^{-19}$$ coulombs, we can state: Charge of electron ≊ $$1.602 x 10^{-19}$$ coulombs.

In summary, the ≊ symbol is a common notation in mathematics and science, signifying values that are in close proximity or nearly identical. Recognizing this symbol aids in differentiating between precise equality and approximate similarity.

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## Codes for the ≊ Symbol

 The Symbol ≊ Alt Code Alt 8778 HTML Code ≊ HTML Entity ≊ CSS Code \224A Hex Code ≊ Unicode U+224A

## 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 8778. 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: &#8778;</b>My symbol: ≊

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

HTML TextOutput
<b>My symbol: &approxeq;</b>My symbol: ≊

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

CSS and HTML TextOutput
<style>
span:after {
content: "\224A";}
</style>
<span>My symbol:</span>
My symbol: ≊

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

HTML TextOutput
<b>My symbol: &#x224A;</b>My symbol: ≊
On the assumption that you already have your canvas and the context set up, use the Hex code in the format 0x224A to place the ≊ symbol on your canvas. For example:
JavaScript Text
const x = "0x"+"E9"
ctx.fillText(String.fromCodePoint(x), 5, 5);
Output

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

The Unicode for ≊ is U+224A. 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:
TypeOutput
224A
[Hold down Alt]
[Press x]

(The 224A turns into ≊. Note that you can omit any leading zeros.)
In JavaScript, the syntax is \uXXXX. So, our example would be \u224A. (Note that the format is 4 hexadecimal characters.)
JavaScript TextOutput
let str = "\u224A"
document.write("My symbol: " + str)
My symbol: ≊