Blockchain By Example

Standard integer division

Handling the division in the previous scenario is just the same as working with integer divisions, as Ethereum doesn’t adopt floating point numbers. The division would result in a floor of the calculation with the remainder discarded. For example, the division 17/3 equals 5, with the remainder of 2 discarded. To fix this, we create a new method that does the following:

function calcul(uint a, uint b, uint precision) public pure returns (uint) {    require(b != 0);    return a * (10 ** (precision)) / b;}

Note that the double asterisk, **, is a Solidity operator representing the exponentiation operation. In our example, 10 is the base whereas precision is the exponent.

If we divide 17 by 3 using the calcul() function, and ...