# math.RoundToEven() Function in Golang With Examples

• Last Updated : 13 Apr, 2020

Go language provides inbuilt support for basic constants and mathematical functions to perform operations on the numbers with the help of the math package. You can round off the given number to the nearest even integer with the help of RoundToEven() function provided by the math package. So, you need to add a math package in your program with the help of the import keyword to access the RoundToEven() function.

Syntax:

`func RoundToEven(a float64) float64`
• If you pass -Inf or +Inf in this function like RoundToEven(-Inf) or RoundToEven(+Inf), then this function will return -Inf or +Inf.
• If you pass -0 or +0 in this function like RoundToEven(-0) or RoundToEven(+0), then this function will return -0 or +0.
• If you pass NaN in this function like RoundToEven(NaN), then this function will return NaN.

Example 1:

 `// Golang program to illustrate how to round``// off the given number to nearest even integer`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Using RoundToEven() function``    ``res_1 := math.RoundToEven(45.98)``    ``res_2 := math.RoundToEven(-119.98)``    ``res_3 := math.RoundToEven(math.Inf(-1))``    ``res_4 := math.RoundToEven(math.NaN())``    ``res_5 := math.RoundToEven(math.Inf(1))`` ` `    ``// Displaying the result``    ``fmt.Printf(``"Result 1: %.1f"``, res_1)``    ``fmt.Printf(``"\nResult 2: %.1f"``, res_2)``    ``fmt.Printf(``"\nResult 3: %.1f"``, res_3)``    ``fmt.Printf(``"\nResult 4: %.1f"``, res_4)``    ``fmt.Printf(``"\nResult 5: %.1f"``, res_5)`` ` `}`

Output:

```Result 1: 46.0
Result 2: -120.0
Result 3: -Inf
Result 4: NaN
Result 5: +Inf
```

Example 2:

 `// Golang program to illustrate how to round``// off the given number to nearest even integer`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Using RoundToEven() function``    ``nvalue_1 := math.RoundToEven(59.89)``    ``nvalue_2 := math.RoundToEven(-7.567)`` ` `    ``// Sum of the given numbers``    ``res := nvalue_1 + nvalue_2``    ``fmt.Printf(``"%.2f + %.2f = %.2f"``,``            ``nvalue_1, nvalue_2, res)`` ` `}`

Output:

`60.00 + -8.00 = 52.00`

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