Custom Postfix Operator is even

The is even postfix operator checks whether a numeric value is an even integer.

Description

This operator evaluates a numeric expression and returns true if the value is an even integer, false otherwise. The operator checks that:

  1. The operand can be converted to a numeric value

  2. The numeric value is an integer (no fractional part)

  3. The integer is divisible by 2

Operand

  • Type: Numeric expression

  • Description: A numeric value to test for evenness. The operand is placed before the operator.

  • Returns:

    • true if the operand is an even integer

    • false if the operand is an odd integer or has a fractional part

    • null if the operand cannot be converted to a number

Examples:

{
  "Example1": "$(8 is even)",
  // Result: true

  "Example2": "$(5 is even)",
  // Result: false

  "Example3": "$(TestData[2] is even)",
  // Where TestData[2] = 8, Result: true

  "Example4": "$(TestData[0] is even)",
  // Where TestData[0] = 1, Result: false

  "Example5": "Employees.Where(e => e.Age is even)"
  // Filters employees whose age is an even number
}