Snippet. Vala. How to Convert String to Long

This Vala snippet shows how to convert a string to long. To convert from String to long integer in Vala use the long.parse() method.

long number = long.parse("123");

Warning. The to_long() method used in previous versions of Vala is deprecated and will result in warning:

string string_number = "123";
long number = str_number.to_long();

Result:

warning: string.to_long is deprecated. Use long.parse

Updated on: 13 Nov 2025