Can anyone clarify why the result of the following code is [1,3]?
[1,3,6].filter( item => item % 2)
I anticipated getting the even numbers from the array.
Thank you for your help!
Can anyone clarify why the result of the following code is [1,3]?
[1,3,6].filter( item => item % 2)
I anticipated getting the even numbers from the array.
Thank you for your help!
An analysis is done to confirm the validity of a boolean statement, where 3 divided by 2 gives a remainder of 1, resulting in a true value.
For proper filtration, use item % 2 == 0
Numbers that can be evenly divided by 2 are considered even numbers.
The modulus operator % provides the remainder when it is applied to a number. For instance,
const num = 6;
const result = num % 4; // yields 2
Therefore, if % is used with 2, a number is classified as even if the remainder is zero. If not, then the number is considered odd.
// program to determine if a number is odd or even
// user input required
const num = prompt("Please enter a number: ");
//checking for an **even** number
if(num % 2 == 0) {
console.log("This number is even.");
}
// code for **odd** number
else {
console.log("This number is odd.");
}
Source :
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