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content/incrementing_and_decrementing.md
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content/incrementing_and_decrementing.md
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---
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title: Incrementing and decrementing
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---
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# Incrementing and decrementing
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A useful feature that might not be super well knows is the ability to increment and decrement with `C-a` and `C-x`.
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## Basic usage
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Use `C-a` to increment and `C-x` to decrement, optionally prefixed by a count.
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Note that `vim` will jump to the next thing it can increment/decrement in the line.
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Here I increment/decrement the first number,
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show that it jumps to the next relevant location in the line,
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and finally use a count with `1000<C-a>`.
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## Usage with a selection
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If you make a selection and try to increment/decrement it will do so per line,
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taking your selection into account.
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So the first valid thing in the line that is inside the selection will be targeted.
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There is another more obscure feature by prefixing the action with `g`.
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This will increment the numbers with an increasing sequence.
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I think an example shows it off better than anything else.
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Here I create a line "0. item" and duplicate it a few times.
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I visually line select everything (`ggVG`) and do `g <c-A>`.
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## Settings that affect usage
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By default incrementing/decrementing works not only for decimal numbers but also on binary and hexadecimal numbers.
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The two other modes available is "octal" and "alpha".
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The latter one is weird but might occasionally be useful.
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Note that it only works on single characters, so "z" won't turn into "aa" on increment.
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asciinema(um2yGsUBaxlJ5d52Hx3Am5ET1)