>Hi All
>
>I have written my own number to binary to number function but I thought I would ask if there was an easier method. I am looking to take number eg 123456 and convert that into a binary string like "00000000000000011110001001000000". Is there a fast way to do this num to char-bin and back to number?

Others have given code samples; I will show the algorithm, as done with pencil and paper.

Example: Convert 11 (decimal) to binary. Repeteadly divide by 2, and write down the remainders, until you get a result of zero:

Result   Remainder
11       --        && The starting number
 5        1
 2        1
 1        0
 0        1

The binary number is the column "remainder", read from the bottom to the top, in this example, 1011 (binary).

Depending on the requirements, you may want to later fill out a few zeroes to the left, e.g. 00001011.

The same algorithm can be used to convert decimal to any other base, e.g. hexadecimal.