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title description date publishdate lastmod categories menu keywords aliases signature workson hugoversion relatedfuncs deprecated
substr Extracts parts of a string from a specified character's position and returns the specified number of characters. 2017-02-01 2017-02-01 2017-02-01
functions
docs
parent
functions
strings
substr STRING START [LENGTH]
strings.Substr STRING START [LENGTH]
false

It normally takes two parameters: start and length. It can also take one parameter: start, i.e. length is omitted, in which case the substring starting from start until the end of the string will be returned.

To extract characters from the end of the string, use a negative start number.

If length is given and is negative, that number of characters will be omitted from the end of string.

{{ substr "abcdef" 0 }} → "abcdef"
{{ substr "abcdef" 1 }} → "bcdef"

{{ substr "abcdef" 0 1 }} → "a"
{{ substr "abcdef" 1 1 }} → "b"

{{ substr "abcdef" 0 -1 }} → "abcde"
{{ substr "abcdef" 1 -1 }} → "bcde"

{{ substr "abcdef" -1 }} → "f"
{{ substr "abcdef" -2 }} → "ef"

{{ substr "abcdef" -1 1 }} → "f"
{{ substr "abcdef" -2 1 }} → "e"

{{ substr "abcdef" -3 -1 }} → "de"
{{ substr "abcdef" -3 -2 }} → "d"