Wolfram: Convert to Binary, Hexadecimal, Base 64, etc.

Integer to String

• IntegerString

IntegerString[n]

to string.

(* integer to string *)
IntegerString[10] === "10"
(* True *)

Integer to String, to Binary, Hexadecimal, and other Bases

IntegerString[n,b]

to string, in base b. b can be up to 36. a to z is used for digits.

(* binary *)
IntegerString[10,2] === "1010"
(* True *)

(* hexadecimal *)
IntegerString[1000,16] === "3e8"
(* True *)

(* hexadecimal, uppercase *)
ToUpperCase @ IntegerString[1000,16] === "3E8"
(* True *)

(* base 36. max base *)
IntegerString[10000, 36] === "7ps"
(* True *)

IntegerString[n,b,len]

• Return len digits, counting from right.
• If there are more digits, remove extra on left.
• If not enough digits, pad 0 on left.

(* pad with 0 *)
IntegerString[1000, 16, 5]
(* 003e8 *)

(* if padding spec is less than required number of digits, left digits are removed *)
IntegerString[1000, 16, 2]
(* e8 *)

Integer to String, to Base58, Base64

IntegerString[n,baseSpec]

use a special base spec.

(* base 58, bitcoin encoding alphabet *)
IntegerString[1000, "Base58"] === "JF"
(* True *)

(* Base64 *)
IntegerString[1000, "Base64"] === "Po"
(* True *)

Binary and Hexadecimal String to Number

• FromDigits

(* hexadecimal string to decimal number *)
FromDigits["f", 16]
(* 15 *)

FromDigits["fff", 16]
(* 4095 *)

(* HHHH------------------------------ *)

(* binary string to decimal number *)
FromDigits["1111", 2]
(* 15 *)