# Erase saved Values ?

**URL:** <https://community.wolfram.com/t/erase-saved-values/11766>\
**Category:** Questions\
**Tags:** engineering, mathematica\
**Created:** [January 6, 2018, 9:30am UTC](https://community.wolfram.com/t/erase-saved-values/11766 "2018-01-06T09:30:27Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![hampjonas](https://avatars.discourse-cdn.com/v4/letter/h/3ab097/32.png) [@hampjonas](https://community.wolfram.com/u/hampjonas)\
**Post date:** [January 6, 2018, 9:30am UTC](https://community.wolfram.com/t/erase-saved-values/11766/1 "2018-01-06T09:30:27Z")

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Hi,  
in a Notebook, I defined some constants by numerical values. But I cannot erase that definition. Neither by opening a new Notebook, nor by using the command “Clear”. Does someone know how to do that?

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<div class="post-metadata">

**Author:** ![gianlucagorni](https://avatars.discourse-cdn.com/v4/letter/g/ec9cab/32.png) [@gianlucagorni](https://community.wolfram.com/u/gianlucagorni)\
**Post date:** [January 6, 2018, 1:15pm UTC](https://community.wolfram.com/t/erase-saved-values/11766/2 "2018-01-06T13:15:53Z")

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What did you do exactly with `Clear`? This way works for me:

```
a = 1;
Clear[a]

```

Another way:

```
a = 1;
a =.

```

A more drastic `Clear`, that wipes out all symbols in the `Global` context:

```
Clear["Global`*"]

```

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<div class="post-metadata">

**Author:** ![murray](https://yyz1.discourse-cdn.com/wolfram/user_avatar/community.wolfram.com/murray/32/39879_2.png) [@murray](https://community.wolfram.com/u/murray)\
**Post date:** [January 6, 2018, 8:41pm UTC](https://community.wolfram.com/t/erase-saved-values/11766/3 "2018-01-06T20:41:11Z")

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Perhaps you are troubled that the symbol `a` remains even after you use `Clear` on it:

```
    Names["Global`*"]
{}
    a = 1;
    Clear[a]
    Names["Global`*"]
{a}

```

In that case, you could use `Remove` instead of `Clear`:

```
    Remove[a]
    Names["Global`*"]
{}

```

---

<div class="post-metadata">

**Author:** ![hampjonas](https://avatars.discourse-cdn.com/v4/letter/h/3ab097/32.png) [@hampjonas](https://community.wolfram.com/u/hampjonas)\
**Post date:** [January 7, 2018, 10:40am UTC](https://community.wolfram.com/t/erase-saved-values/11766/4 "2018-01-07T10:40:49Z")

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Thank you very much, the “Remove” Command works very well. Have a nice day.