# Increment All The Numbers Vim's substitution feature can be used for more than simple static text replacement. Each replacement can be the result of some operation on the original text. For instance, what if we'd like to increment all numbers in the buffer? We can achieve this by searching for all numbers and then using `\=` with `submatch`. Whenever the replacement string of a substitution starts with `\=`, the remainder of the string is evaluated as an expression. Given the following text in our buffer: ``` 1 2 a b c 45 123 1982 ``` We can run the following substitution command: ``` :%s/\d\+/\=submatch(0)+1/g ``` This will transform all digits in the buffer, resulting in: ``` 2 3 a b c 46 124 1983 ``` Want to decrement all the numbers instead? ``` :%s/\d\+/\=submatch(0)-1/g ``` See `:h sub-replace-expression` for more details. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ploegert.gitbook.io/til/tools/vim/increment-all-the-numbers.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.