Delete digits after two decimal point not round number in javascript?

Question

I have this :

i=4.568;
document.write(i.toFixed(2));

output :

4.57

But i don't want to round the last number to 7 , what can i do?

Solution 1

Use simple math instead;

document.write(Math.floor(i * 100) / 100);

(jsFiddle)

You can stick it in your own function for reuse;

function myToFixed(i, digits) {
    var pow = Math.pow(10, digits);

    return Math.floor(i * pow) / pow;
}

document.write(myToFixed(i, 2));

(jsFiddle)

Solution 2

Just cut the longer string:

i.toFixed(3).replace(/\.(\d\d)\d?$/, '.$1')

Comments

[AMIN Gholibeigian]

The function returns nothing ..!

[AMIN Gholibeigian]

should be : document.write(Math.floor(i * 100)/ 100);

[Angry 84]

toFixed is a shorter solution which does its job.

[Steven.Chang]

This is not a correct method due to floating point number precision problem. Ex: try 0.29, you will get 0.28 instead