Can you input decimals number in smart contract?

Question

I'm having an issue where send 0.1 or 1.1 is saved as 0 and 1 in my contract's storage.

Does anyone knows how to properly pass decimals ?

No, there are no fixed-point numbers in Solidity. See What fixed or float point math libraries are available in solidity?. — Paul Razvan Berg, Apr 20 '21 at 15:53

score 6 · Accepted Answer · answered Feb 16 '16 at 23:37

6

Floating-point or fixed-point decimals have not yet been implemented in Solidity.

If you want, for example, 10 decimal places of precision you can just multiply all inputs by 10^10.

In this case, you would input 0.1e10 or 1.1e10 respectively, then when you fetch them you can just divide by 1e10

answered Feb 16 '16 at 23:37

Tjaden Hess

What about negative int -1 ? – jayD Feb 17 '16 at 01:34
negatives should still work, just use int instead of uint – Tjaden Hess Feb 17 '16 at 01:35
Wouldn't dividing by 1e10 just chop off everything that's past the decimal anyway? – Jossie Calderon Jun 15 '17 at 07:59
You would only do the division when displaying the value to the end user, in which case you would be using a language with floating point support like JS – Tjaden Hess Jun 15 '17 at 10:07

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