could you please help me understand why the following line result is [1,3]?
[1,3,6].filter( item => item % 2)
I was expecting to receive the even number from the array.
Many thanks!
Filter checks for a boolean, 3 % 2 is equal to 1, which evaluates to true.
You want item % 2 == 0
Even numbers are those numbers that are exactly divisible by 2.
The remainder operator % gives the remainder when used with a number. For example,
const number = 6;
const result = number % 4; // 2
Hence, when % is used with 2, the number is even if the remainder is zero. Otherwise, the number is odd.
// program to check if the number is even or odd
// take input from the user
const number = prompt("Enter a number: ");
//check if the number is **even**
if(number % 2 == 0) {
console.log("The number is even.");
}
// if the number is **odd**
else {
console.log("The number is odd.");
}
ref : https://www.programiz.com/javascript/examples/even-odd