Mod(x, y, pos)
The remainder (modulus) of «x» / «y».
The sign of the result of
Mod(x,y) is the same as the sign of «x» -- i.e., if «x» is negative, then so is the result. The sign of «y» does not impact the sign of the result. This variation is the same convention used by the corresponding operator in C/C++ (ISO 1999), C#, Java, PHP, Visual Basic, AMPL and many other languages. Some languages, including MATLAB, Lisp, Fortran, and Ada, have two different modulo operators, with one corresponding to this convention. The modulo operator in a few other languages, including Mathematica, R and Excel, do not follow this convention (these use the sign of the denominator).
You can specify «pos» as true to force the result to be non-negative, in the range
0 ≤ Mod(x,y) < Abs(y). As «x» increases through all negative and positive numbers, the result cycles through this range.
Mod(x,1) extracts the fractional portion of a number.
Mod(20,7) → 6
Mod(-20,7) → -6
Mod(-20,-7) → -6
Mod(20,-7) → 6
Mod(-20,7,pos: true) → 1
Mod(Pi,1) → 0.141592653589793
IsOdd and IsEven
To test whether an integer
x is odd use
Mod(x, 2) == 1, and similarly, to test whether an integer is even use
Mod(x, 2) == 0.
To test whether a number
x is an integer, use
Mod(x,1) == 0
The fractional part of a number
Time part of a date-time number
(new in Analytica 6.0) When you have a date-time number,
Mod(d,1) returns the time part and returns it as a date-time number instead of a float.
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