> ## Documentation Index > Fetch the complete documentation index at: https://tfts.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Fn Class Reference > Complete list of Terraform functions available via the Fn class. The `Fn` class provides access to all built-in Terraform functions. ## Numeric Functions | Method | Signature | Return Type | | :--------- | :--------------------------------------- | :---------- | | `abs` | `Fn.abs(num: number)` | `number` | | `ceil` | `Fn.ceil(num: number)` | `number` | | `floor` | `Fn.floor(num: number)` | `number` | | `log` | `Fn.log(num: number, base: number)` | `number` | | `max` | `Fn.max(...nums: number[])` | `number` | | `min` | `Fn.min(...nums: number[])` | `number` | | `parseint` | `Fn.parseint(str: string, base: number)` | `number` | | `pow` | `Fn.pow(num: number, power: number)` | `number` | | `signum` | `Fn.signum(num: number)` | `number` | ## String Functions | Method | Signature | Return Type | | :----------- | :--------------------------------------------------------- | :---------- | | `chomp` | `Fn.chomp(str: string)` | `string` | | `format` | `Fn.format(format: string, ...args: any[])` | `string` | | `formatlist` | `Fn.formatlist(format: string, ...args: any[])` | `string[]` | | `indent` | `Fn.indent(num: number, str: string)` | `string` | | `join` | `Fn.join(sep: string, list: string[])` | `string` | | `lower` | `Fn.lower(str: string)` | `string` | | `replace` | `Fn.replace(str: string, substr: string, replace: string)` | `string` | | `split` | `Fn.split(sep: string, str: string)` | `string[]` | | `strrev` | `Fn.strrev(str: string)` | `string` | | `substr` | `Fn.substr(str: string, offset: number, length: number)` | `string` | | `trim` | `Fn.trim(str: string, cutset: string)` | `string` | | `trimprefix` | `Fn.trimprefix(str: string, prefix: string)` | `string` | | `trimsuffix` | `Fn.trimsuffix(str: string, suffix: string)` | `string` | | `trimspace` | `Fn.trimspace(str: string)` | `string` | | `upper` | `Fn.upper(str: string)` | `string` | ## Collection Functions | Method | Signature | Return Type | | :---------------- | :---------------------------------------------------------------- | :------------------------- | | `alltrue` | `Fn.alltrue(list: any[])` | `boolean` | | `anytrue` | `Fn.anytrue(list: any[])` | `boolean` | | `chunklist` | `Fn.chunklist(list: any[], size: number)` | `any[][]` | | `coalesce` | `Fn.coalesce(...args: any[])` | `any` | | `coalescelist` | `Fn.coalescelist(...args: any[][])` | `any[]` | | `compact` | `Fn.compact(list: string[])` | `string[]` | | `concat` | `Fn.concat(...lists: any[][])` | `any[]` | | `contains` | `Fn.contains(list: any[], value: any)` | `boolean` | | `distinct` | `Fn.distinct(list: any[])` | `any[]` | | `element` | `Fn.element(list: any[], index: number)` | `any` | | `flatten` | `Fn.flatten(list: any[])` | `any[]` | | `index` | `Fn.index(list: any[], value: any)` | `number` | | `keys` | `Fn.keys(map: Record)` | `string[]` | | `length` | `Fn.length(list: any)` | `number` | | `lookup` | `Fn.lookup(map: Record, key: string, default?: any)` | `any` | | `matchkeys` | `Fn.matchkeys(values: any[], keys: any[], search: any[])` | `any[]` | | `merge` | `Fn.merge(...maps: Record[])` | `Record` | | `one` | `Fn.one(list: any[])` | `any` | | `range` | `Fn.range(start: number, end?: number, step?: number)` | `number[]` | | `reverse` | `Fn.reverse(list: any[])` | `any[]` | | `setintersection` | `Fn.setintersection(...sets: any[][])` | `any[]` | | `setproduct` | `Fn.setproduct(...lists: any[][])` | `any[]` | | `setsubtract` | `Fn.setsubtract(a: any[], b: any[])` | `any[]` | | `setunion` | `Fn.setunion(...sets: any[][])` | `any[]` | | `slice` | `Fn.slice(list: any[], start: number, end: number)` | `any[]` | | `sort` | `Fn.sort(list: string[])` | `string[]` | | `sum` | `Fn.sum(list: number[])` | `number` | | `transpose` | `Fn.transpose(map: Record)` | `Record` | | `values` | `Fn.values(map: Record)` | `any[]` | | `zipmap` | `Fn.zipmap(keys: string[], values: any[])` | `Record` | ## Encoding Functions | Method | Signature | Return Type | | :----------------- | :--------------------------------------------------- | :---------- | | `base64decode` | `Fn.base64decode(str: string)` | `string` | | `base64encode` | `Fn.base64encode(str: string)` | `string` | | `base64gzip` | `Fn.base64gzip(str: string)` | `string` | | `csvdecode` | `Fn.csvdecode(str: string)` | `any[]` | | `jsondecode` | `Fn.jsondecode(str: string)` | `any` | | `jsonencode` | `Fn.jsonencode(val: any)` | `string` | | `textdecodebase64` | `Fn.textdecodebase64(str: string, encoding: string)` | `string` | | `textencodebase64` | `Fn.textencodebase64(str: string, encoding: string)` | `string` | | `urlencode` | `Fn.urlencode(str: string)` | `string` | | `yamldecode` | `Fn.yamldecode(str: string)` | `any` | | `yamlencode` | `Fn.yamlencode(val: any)` | `string` | ## Filesystem Functions | Method | Signature | Return Type | | :----------------- | :------------------------------------------ | :---------- | | `abspath` | `Fn.abspath(path: string)` | `string` | | `dirname` | `Fn.dirname(path: string)` | `string` | | `file` | `Fn.file(path: string)` | `string` | | `filebase64` | `Fn.filebase64(path: string)` | `string` | | `fileexists` | `Fn.fileexists(path: string)` | `boolean` | | `fileset` | `Fn.fileset(path: string, pattern: string)` | `string[]` | | `filebase64sha256` | `Fn.filebase64sha256(path: string)` | `string` | | `filebase64sha512` | `Fn.filebase64sha512(path: string)` | `string` | | `filemd5` | `Fn.filemd5(path: string)` | `string` | | `filesha1` | `Fn.filesha1(path: string)` | `string` | | `filesha256` | `Fn.filesha256(path: string)` | `string` | | `filesha512` | `Fn.filesha512(path: string)` | `string` | | `basename` | `Fn.basename(path: string)` | `string` | | `pathexpand` | `Fn.pathexpand(path: string)` | `string` | ## Date and Time Functions | Method | Signature | Return Type | | :----------- | :-------------------------------------------- | :---------- | | `formatdate` | `Fn.formatdate(format: string, time: string)` | `string` | | `timeadd` | `Fn.timeadd(time: string, duration: string)` | `string` | | `timestamp` | `Fn.timestamp()` | `string` | ## Hash and Crypto Functions | Method | Signature | Return Type | | :------------- | :------------------------------------------- | :---------- | | `base64sha256` | `Fn.base64sha256(str: string)` | `string` | | `base64sha512` | `Fn.base64sha512(str: string)` | `string` | | `bcrypt` | `Fn.bcrypt(str: string, cost?: number)` | `string` | | `md5` | `Fn.md5(str: string)` | `string` | | `rsadecrypt` | `Fn.rsadecrypt(str: string, key: string)` | `string` | | `sha1` | `Fn.sha1(str: string)` | `string` | | `sha256` | `Fn.sha256(str: string)` | `string` | | `sha512` | `Fn.sha512(str: string)` | `string` | | `uuid` | `Fn.uuid()` | `string` | | `uuidv5` | `Fn.uuidv5(namespace: string, name: string)` | `string` | ## IP Network Functions | Method | Signature | Return Type | | :------------ | :--------------------------------------------------------------- | :---------- | | `cidrhost` | `Fn.cidrhost(prefix: string, hostnum: number)` | `string` | | `cidrnetmask` | `Fn.cidrnetmask(prefix: string)` | `string` | | `cidrsubnet` | `Fn.cidrsubnet(prefix: string, newbits: number, netnum: number)` | `string` | | `cidrsubnets` | `Fn.cidrsubnets(prefix: string, ...newbits: number[])` | `string[]` | ## Type Conversion Functions | Method | Signature | Return Type | | :------------- | :-------------------------- | :-------------------- | | `can` | `Fn.can(exp: any)` | `boolean` | | `nonsensitive` | `Fn.nonsensitive(val: any)` | `any` | | `sensitive` | `Fn.sensitive(val: any)` | `any` | | `tobool` | `Fn.tobool(val: any)` | `boolean` | | `tolist` | `Fn.tolist(val: any)` | `any[]` | | `tomap` | `Fn.tomap(val: any)` | `Record` | | `tonumber` | `Fn.tonumber(val: any)` | `number` | | `toset` | `Fn.toset(val: any)` | `any[]` | | `tostring` | `Fn.tostring(val: any)` | `string` | | `try` | `Fn.try(...exps: any[])` | `any` | | `type` | `Fn.type(val: any)` | `string` |