Some question, need help ><

function IsIntEven takes integer i returns boolean

...
...

endfunction

IsIntEven(2) //returns true
IsIntEven(19) // returns false
IsIntEven(100) //returns true
IsIntEven(7) // returns false

function IsIntEven takes integer i returns boolean
 local integer n = 2*R2I(I2R(i)/2)
    if n==i then
        return true
    else
        return false
    endif
endfunction

function ModuloInteger takes integer dividend, integer divisor returns integer
    local integer modulus = dividend - (dividend / divisor) * divisor

    // If the dividend was negative, the above modulus calculation will
    // be negative, but within (-divisor..0).  We can add (divisor) to
    // shift this result into the desired range of (0..divisor).
    if (modulus < 0) then
        set modulus = modulus + divisor
    endif

    return modulus
endfunction

function IsIntEven takes integer i returns boolean
    return i == (i/2)*2
endfunction