Kotlin Program to Round a Number to n Decimal Places

In this article, we will understand how to round a number to n decimal places. Rounding of decimal values are done using the ceil() or floor() functions.

Below is a demonstration of the same ?

Suppose our input is

Input : 3.1415 

The desired output would be ?

Output : 3.2 

Algorithm

• Step 1 ? START

• Step 2 ? Declare a float value namely myInput.

• Step 3 ? Define the values

• Step 4 ? Use format() to alter the number of decimal places required. Store the result.

• Step 5 ? Display the result

• Step 6 ? Stop

Example 1

In this example, we will Round a Number to n Decimal Places. First, let us declare a variable for input

val myInput = 3.1415 

Now, we will format and round the input to 3 decimal places using %.3f ?

println("%.3f".format(myInput)) 

Let us now see the complete example to round a number to n decimal places ?

 fun main() { val myInput = 3.1415 println("The number is defined as $myInput") println("The result after rounding the number to 3 decimal places is: ") println("%.3f".format(myInput)) } 
 
 
 

Output

The number is defined as 3.1415 The result after rounding the number to 3 decimal places is: 3.142 

Example 2

In this example, we will round a Number to n Decimal Places ?

 fun main() { val myInput = 3.1415 println("The number is defined as $myInput") roundDecimal(myInput) } fun roundDecimal(myInput: Double) { println("The result after rounding the number to 3 decimal places is: ") println("%.3f".format(myInput)) } 
 
 
 

Output

The number is defined as 3.1415 The result after rounding the number to 3 decimal places is: 3.142