• ← Floor
• → IntegerDigits

FromDigits

WMA link

FromDigits[l]

returns the integer corresponding to the decimal representation given by l. l can be a list of digits or a string.

FromDigits[l, b]

returns the integer corresponding to the base b representation given by l. l can be a list of digits or a string.

• • FromDigits["123"]

• • FromDigits[{1, 2, 3}]

• • FromDigits[{1, 0, 1}, 1000]

FromDigits can handle symbolic input:

• • FromDigits[{a, b, c}, 5]

Note that FromDigits does not automatically detect if you are providing a non-decimal representation:

• • FromDigits["a0"]

• • FromDigits["a0", 16]

FromDigits on empty lists or strings returns 0:

• • FromDigits[{}]

• • FromDigits[""]