cast.ToInt

With a decimal (base 10) input:

{{ int 11 }} → 11 (int)
{{ int "11" }} → 11 (int)

{{ int 11.1 }} → 11 (int)
{{ int 11.9 }} → 11 (int)

With a binary (base 2) input:

{{ int 0b11 }} → 3 (int)
{{ int "0b11" }} → 3 (int)

With an octal (base 8) input (use either notation):

{{ int 011 }} → 9 (int)
{{ int "011" }} → 9 (int)

{{ int 0o11 }} → 9 (int)
{{ int "0o11" }} → 9 (int)

With a hexadecimal (base 16) input:

{{ int 0x11 }} → 17 (int)
{{ int "0x11" }} → 17 (int)

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