Certain math operations are just silly and should not be performed because their results are predictable.

In particular, anyValue % 1 is silly because it will always return 0.

Casting a non-floating-point value to floating-point and then passing it to Math.round, Math.ceil, or Math.floor is silly because the result will always be the original value.

These operations are silly with any constant value: Math.abs, Math.ceil, Math.floor, Math.rint, Math.round.

And these oprations are silly with certain constant values:

Noncompliant Code Example

public void doMath(int a) {
  double floor = Math.floor((double)a); // Noncompliant
  double ceiling = Math.ceil(4.2);  // Noncompliant
  double arcTan = Math.atan(0.0);  // Noncompliant
}