55 lines
750 B
Markdown
55 lines
750 B
Markdown
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# Dropping variables
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Sometimes in Granite, you may want to un-initalise a variable you initialised! This is easy to do.
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## New operations
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* `:$(variable)`, variable drop, deletes `(variable)`
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## Tutorial
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Look at this simple program:
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```
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:?x
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:^x
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:!x
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:?x
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:ax,x,x
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:!x
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```
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This program is fairly simple, what we expect is that it will prompt the user twice and do some maths on their number!
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What we _instead_ get is this:
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```
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? 9
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10
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105
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10
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```
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This is not very nice looking as it is interpreting the users first input as a prompt.
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To fix this, use `:$x` after the first print operation to drop the `x` variable!
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Now your output can look like this:
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```
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? 9
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10
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? 5
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10
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```
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Much better!
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## After example
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```
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:?x
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:^x
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:!x
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:$x
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:?x
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:ax,x,x
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:!x
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```
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