Format number using decimal format in kotlin

Question

I am facing an issue where I need to do some calculations with a number like for example 5000,00 multiplied it by (1,025^3).

So in this case 5000,00 * (1,025^3) = 5385,45

So my question is, how can I format the number 5385,45 to be like 5.385,45 using decimal format maybe?

I tried by myself and I did this piece of code that outputs 5385,45 in the app but not 5.385,45

    var interestValue = (5000,00*(Math.pow(1.025,yearValue)))
    val number = java.lang.Double.valueOf(interestValue)
    val dec = DecimalFormat("#,00")
    val credits = dec.format(number)
    vValueInterest.text = credits

Possible duplicate of [How to print a double with two decimals in Android?](https://stackoverflow.com/questions/8065114/how-to-print-a-double-with-two-decimals-in-android) — shkschneider, Dec 19 '18 at 14:04

score 28 · Accepted Answer · answered Dec 19 '18 at 10:19

28

This is the format you need:

val dec = DecimalFormat("#,###.##")

will print:

5.384,45

if you need always exactly 2 digits after the decimal point:

val dec = DecimalFormat("#,###.00")

answered Dec 19 '18 at 10:19

forpas

117,400
9
23
54

4

0 will be printed as .00 instead of 0.00. Just use `String.format("%.2f", number)` – Choletski Dec 18 '19 at 20:01
@Choletski `0` will be printed as `0`. The question is not about formatting fixed decimal places but about formatting a number like `5385,45` to `5.385,45`, meaning about the thousands separator. – forpas Dec 18 '19 at 20:11
4

If you need `0` to be printed as `0.00`, you can use `DecimalFormat("#,##0.00")`. – Togashi Sep 16 '20 at 12:05

score 12 · Answer 2 · answered Dec 19 '18 at 10:25

12

val num = 1.34567
val df = DecimalFormat("#.##")
df.roundingMode = RoundingMode.CEILING

println(df.format(num))

When you run the program, the output will be: 1.34

Check: https://www.programiz.com/kotlin-programming/examples/round-number-decimal

answered Dec 19 '18 at 10:25

Karim

492
2
8

score 2 · Answer 3 · edited Aug 01 '20 at 06:01

2

Used:

%.numberf

fun main(args: Array<String>) {
var A: Double
A = readLine()!!.toDouble()
var bla = A*A
var calculator = 3.14159 * bla
println("A=%.4f".format(calculator))
}

edited Aug 01 '20 at 06:01

scott_lotus

2,977
19
43
66

answered Jul 31 '20 at 20:59

Giovanni Rizzardo

21
1

score 0 · Answer 4 · answered Dec 19 '18 at 10:19

0

Try val dec = DecimalFormat("#.###,00"). For examples of DecimalFormat check this link.

answered Dec 19 '18 at 10:19

Elvedin Selimoski

289
1
12

Format number using decimal format in kotlin

4 Answers4

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