using System;
static class MathFunction {
// Return the reciprocal of a value.
static public double reciprocal(double num) {
return 1/num;
}
// Return the fractional part of a value.
static public double fracPart(double num) {
return num - (int) num;
}
// Return true if num is even.
static public bool isEven(double num) {
return (num % 2) == 0 ? true : false;
}
// Return true of num is odd.
static public bool isOdd(double num) {
return !isEven(num);
}
}
class MainClass {
public static void Main() {
Console.WriteLine("Reciprocal of 5 is " +
MathFunction.reciprocal(5.0));
Console.WriteLine("Fractional part of 4.234 is " +
MathFunction.fracPart(4.234));
if(MathFunction.isEven(10))
Console.WriteLine("10 is even.");
if(MathFunction.isOdd(5))
Console.WriteLine("5 is odd.");
// The following attempt to create an instance of
// MathFunction will cause an error.
// MathFunction ob = new MathFunction(); // Wrong!
}
}
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