when I "str2num'110110111'" I received 110110111 as the answer

when I "str2num'110110111'" I received 110110111 as the answer.

Adding one more bit there I received 1.10...e+9 (or like that), the scientific notation, which I don't want. I tried and gathered that when the string exceeds 9 (or maybe 10) bits the function returns scientific notation as answer. Is there a way to make sure it returns the exact 'copy' in num form and NOT in scientific notation?

Answer 1

[Star Strider]

I’m not certain what you’re asking.

Try this:

format long g
q = str2num('110110111')

returns:

q =
   110110111

See the documentation on format (link) for more information.

[Walter Roberson]

However, if the first 1 is followed by 15 or more digits, then scientific notation will be used even though 16 digits is representable exactly as an integer.

You can get up to 20 digits exactly by using

sscanf('11111111111111111111', '%lu')

Beyond 20 decimal digits exceeds the capacity of uint64. Beyond that you need to use other tactics, such as

uint8(TheString - '0')