HTML | Meaning | |
---|---|---|

± |
`±` `±` `U+B1` |
Plus–minus SignThe Plus–minus Sign, denoted as ±, is used in mathematics, science, and engineering to indicate an approximation or a range of possible values. |

∓ |
`∓` `U+2213` |
Minus–plus SignThe Minus–plus Sign, denoted as ∓, is used to indicate that the term it precedes is subtracted from the preceding term. |

= |
`=` `U+3D` |
Equal SymbolRepresents equality between two sets or mathematical expressions. |

≠ |
`≠` `≠` `U+2260` |
Not Equal SymbolThe Not Equal Symbol, denoted as ≠, is used in mathematics and computer science to indicate that two values or expressions are not equal to each other. |

√ |
`√` `√` `U+221A` |
Square Root SymbolRepresents the non-negative square root of a number or expression. |

### What is the Plus–minus Sign?

The Plus–minus Sign, symbolized by ±, is used to represent an approximation or a range of possible values.

### Example of Using Plus–minus

In algebra, you might see the square root of 9 represented as √_{9} = ± 3, indicating that it can be either +3 or -3.

### Comparing Plus–minus and Minus–plus

The Plus–minus Sign is more commonly used than the Minus–plus Sign. While both symbols indicate uncertainty or variation, the order of operations differs: ± suggests that the term could be either added or subtracted, whereas ∓ implies that the term should be subtracted or added.

### Applications and Unique Uses of the Plus–minus Sign

The Plus–minus Sign (±) has various applications and unique uses:

**Mathematics:**Commonly used to indicate the positive and negative square roots of a number.**Science:**Used in scientific notation to represent uncertainty.**Engineering:**Employed in technical drawings to indicate tolerances.**Statistics:**Appears in reports to show the margin of error.**Chess:**Used in chess notations to evaluate positions.

### How to Type the Plus–minus Sign Using Keyboard Shortcuts, Alt Codes, and LaTeX

**Windows:**Hold down the`Alt`key and type`0177`

on the numeric keypad, then release the`Alt`key.**Mac:**Press`Option`+`Shift`+`=`.**Linux:**Press`Ctrl`+`Shift`+`u`, then type`00B1`

and press`Enter`.**HTML:**Use the named entity`±`

or the numeric entity`±`

.**LaTeX:**To type the Plus–minus Sign in LaTeX, use the command`\pm`

.