## Numbers were last digit is zero, are even.

Example: 10, 20, 30, 40, etc.

# Attention: Zero!

### The number Zero is neither odd nor even.

1. A pair consists of two elements.
2. Dividing a number by two, we count the number of pairs.
3. Zero elements, resulting zero pairs.

### In words we say:

for any integer , not equal zero ,
if the remainder of the division by two is zero , the number is even,
and if the remainder of the division by two is one , the number is odd.

# JavaScript:

var pairs=Math.floor(number/2);
var remainder=number%2;
if (remainder){
console.log("Number is ODD");
}else if (pairs && remainder === 0){
console.log("Number is EVEN");
}else{
console.log("Number ZERO is neither ODD nor EVEN");
};