The 'fraction' function in Fortran is an intrinsic function that returns the fractional part of a real number. It is often used in mathematical calculations and can be helpful in rounding or truncating numbers.
The 'fraction' function is used by simply passing a real number as an argument. For example, 'fraction(3.14)' would return the value 0.14. It can also be used in mathematical expressions, such as 'x = fraction(5.5) + 1'.
The 'fraction' function specifically returns the fractional part of a number, while other rounding functions such as 'floor' and 'ceiling' return the closest integer value. For example, 'fraction(5.5)' would return 0.5, while 'floor(5.5)' would return 5.
The 'fraction' function can only take in real numbers as input. If a non-numeric value is passed, it will result in an error. Additionally, the function only works with single precision real numbers, so double precision numbers must be converted before being used with the function.
Yes, the 'fraction' function can be used with arrays in Fortran. It will return an array of the same size, with the fractional part of each element in the original array. It can also be used with array expressions, such as 'x = fraction(arr1 + arr2)'.