Construct a number from its base-10 digits:

Base-2 digits:

Construct a number from digits given as string:

Construct a number from digits base 2:

Construct a number from digits in a mixed radix system:

Use symbolic digits and base:

Digits larger than the base are "carried":

Reconstruct a rational number from recurring digits:

Reconstruct a number from its digits in a mixed radix system:

Convert from Roman numerals:

Construct a number with limited precision:

Find the number with recurring digits 123:

Find numbers with successive recurring binary digit sequences:

Find all integers with digits 1, 2 or 3:

Reconstruct a number of seconds from a list {days,hours,minutes,seconds}:

It can also be obtained with NumberCompose:

Perform the same computation using Quantity objects:

IntegerDigits drops the sign:

Without a base specified, the characters are interpreted as extensions of base-10 digits:

If no base is specified, the multicharacter strings are converted using base 10: