FromDigits

FromDigits[list] constructs an integer from the list of its decimal digits.

FromDigits[list, b] takes the digits to be given in base b.

FromDigits["string"] constructs an integer from a string of digits.

Examples

Construct integer from digits:

FromDigits[{1, 2, 3, 4, 5}]
(* 12345 *)

Convert from binary:

FromDigits[{1, 0, 1, 0, 1, 0}, 2]
(* 42 *)

From a string:

FromDigits["9876"]
(* 9876 *)

Please visit the official Wolfram Language Reference for more details.