Clarify cast functions (#2041)

content/en/functions/float.md

@@ -1,17 +1,45 @@
 ---
 title: float
-description: Creates a `float` from the argument passed into the function.
+description: Casts a value to a decimal (base 10) floating point value.
 categories: [functions]
 menu:
   docs:
     parent: functions
-keywords: [strings,floats]
+keywords: [cast,strings,floats]
 signature: ["float INPUT"]
 relatedfuncs: []
 ---
 
-Useful for turning strings into floating point numbers.
+With a decimal (base 10) input:
 
 ```go-html-template
-{{ float "1.23" }} → 1.23
+{{ float 11 }} → 11 (float64)
+{{ float "11" }} → 11 (float64)
+
+{{ float 11.1 }} → 11.1 (float64)
+{{ float "11.1" }} → 11.1 (float64)
+
+{{ float 11.9 }} → 11.9 (float64)
+{{ float "11.9" }} → 11.9 (float64)
+```
+
+With a binary (base 2) input:
+
+```go-html-template
+{{ float 0b11 }} → 3 (float64)
+```
+
+With an octal (base 8) input (use either notation):
+
+```go-html-template
+{{ float 011 }} → 9 (float64)
+{{ float "011" }} → 11 (float64)
+
+{{ float 0o11 }} → 9 (float64)
+```
+
+With a hexadecimal (base 16) input:
+
+```go-html-template
+{{ float 0x11 }} → 17 (float64)
 ```

content/en/functions/int.md

@@ -1,41 +1,51 @@
 ---
 title: int
-description: Creates an `int` from the argument passed into the function.
+description: Casts a value to a decimal (base 10) integer.
 categories: [functions]
 menu:
   docs:
     parent: functions
-keywords: [strings,integers]
+keywords: [cast,strings,integers]
 signature: ["int INPUT"]
 relatedfuncs: []
 ---
 
-Useful for turning strings into numbers.
+With a decimal (base 10) input:
 
 ```go-html-template
-{{ int "123" }} → 123
+{{ int 11 }} → 11 (int)
+{{ int "11" }} → 11 (int)
+
+{{ int 11.1 }} → 11 (int)
+{{ int 11.9 }} → 11 (int)
 ```
 
-{{% note "Usage Note" %}}
-If the input string is supposed to represent a decimal number, and if it has
-leading 0's, then those 0's will have to be removed before passing the string
-to the `int` function, else that string will be tried to be parsed as an octal
-number representation.
-
-The `strings.TrimLeft` can be used for this purpose.
+With a binary (base 2) input:
 
 ```go-html-template
-{{ int ("0987" | strings.TrimLeft "0") }}
-{{ int ("00987" | strings.TrimLeft "0") }}
+{{ int 0b11 }} → 3 (int)
+{{ int "0b11" }} → 3 (int)
 ```
 
-### Explanation
+With an octal (base 8) input (use either notation):
 
-The `int` function eventually calls the `ParseInt` function from the Go library
-`strconv`.
+```go-html-template
+{{ int 011 }} → 9 (int)
+{{ int "011" }} → 9 (int)
 
-From its [documentation](https://golang.org/pkg/strconv/#ParseInt):
+{{ int 0o11 }} → 9 (int)
+{{ int "0o11" }} → 9 (int)
+```
 
-> the base is implied by the string's prefix: base 16 for "0x", base 8 for "0",
-> and base 10 otherwise.
+With a hexadecimal (base 16) input:
+
+```go-html-template
+{{ int 0x11 }} → 17 (int)
+{{ int "0x11" }} → 17 (int)
+```
+
+{{% note %}}
+Values with a leading zero are octal (base 8). When casting a string representation of a decimal (base 10) number, remove leading zeros:
+
+`{{ strings.TrimLeft "0" "0011" | int }} → 11`
 {{% /note %}}

content/en/functions/string.md

@@ -1,13 +1,48 @@
 ---
 title: string
-description: Creates a string from the argument passed to the function
+description: Cast a value to a string.
 categories: [functions]
 menu:
   docs:
     parent: functions
-keywords: [strings]
+keywords: [cast,strings]
 signature: ["string INPUT"]
 relatedfuncs: []
 ---
 
-* `{{ string "BatMan" }}` → "BatMan"
+With a decimal (base 10) input:
+
+```go-html-template
+{{ string 11 }} → 11 (string)
+{{ string "11" }} → 11 (string)
+
+{{ string 11.1 }} → 11.1 (string)
+{{ string "11.1" }} → 11.1 (string)
+
+{{ string 11.9 }} → 11.9 (string)
+{{ string "11.9" }} → 11.9 (string)
+```
+
+With a binary (base 2) input:
+
+```go-html-template
+{{ string 0b11 }} → 3 (string)
+{{ string "0b11" }} → 0b11 (string)
+```
+
+With an octal (base 8) input (use either notation):
+
+```go-html-template
+{{ string 011 }} → 9 (string)
+{{ string "011" }} → 011 (string)
+
+{{ string 0o11 }} → 9 (string)
+{{ string "0o11" }} → 0o11 (string)
+```
+
+With a hexadecimal (base 16) input:
+
+```go-html-template
+{{ string 0x11 }} → 17 (string)
+{{ string "0x11" }} → 0x11 (string)
+```