Js's method of rounding to retain one decimal place

This article introduces the relevant knowledge of "js rounding to retain a decimal place". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Use the Math.Round () function to get the rounded integer part, and then divide it by 10.

Var number = 0.409 flagship alert (Math.round (number * 10) / 10)

Output

0.4

2. Use the toFixed () method to round Number to a number that specifies one decimal place.

Let data=12.135;console.log (data.toFixed (1))

Output

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