Tests if two values are different.

*value1*≠*value 2*

**Menu Location**

Press [♦][=] key to enter ≠.

This command works on all calculators.

1 byte

The ≠ operator compares two values, returning true if they're different, and false if they're equal. It is a basic building block of the conditions used by commands such as If, when(), and While. The results of ≠ and the other relational operators (=, >, ≥, <, and ≤) can be combined with the and, or, xor, and not operators to create more complicated conditions.

It returns a single value for most types of data, and returns true if the two sides are mismatched in type: comparing a single number to a list, for instance, or comparing two lists that are of a different size. The only exception is when comparing two lists or two matrices of the same size: in that case, it compares them element-by-element, and returns a list or matrix of true/false values.

```
:2+2≠4
false
:2+2≠5
true
:{1,2,3}≠{1,4,3}
{false true false}
```

If either side or both contains undefined variables, ≠ will wait to return a value unless it's something clearly true or false for any value of the variable (for instance, x≠x). You can do math with the resulting inequality: if an operation makes sense, it will be applied to both sides: for instance, if x≠y, then you can negate it to get -x≠-y. An operation will not be applied to both sides if it wouldn't be consistent with the previous inequality: for example, you can't square both sides, since if x≠y it can still be the case that x^2=y^2. You can also extract the two halves of the inequality with left() and right().