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# android – Format number using decimal format in kotlin

Questions:

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
``````

This is the format you need:

``````val dec = DecimalFormat("#,Answer：.##")
``````

will print:

``````5.384,45
``````

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

``````val dec = DecimalFormat("#,Answer：.00")
``````

``````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

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