Convert a float64 to an int in Go

go
Chris Bunch picture Chris Bunch · Nov 5, 2011 · Viewed 174.1k times · Source

How does one convert a float64 to an int in Go? I know the strconv package can be used to convert anything to or from a string, but not between data types where one isn't a string. I know I can use fmt.Sprintf to convert anything to a string, and then strconv it to the data type I need, but this extra conversion seems a bit clumsy - is there a better way to do this?

Answer

David Grayson picture David Grayson · Nov 5, 2011 
package main
import "fmt"
func main() {
  var x float64 = 5.7
  var y int = int(x)
  fmt.Println(y)  // outputs "5"
}

Related questions

How to check if a map contains a key in Go?

I know I can iterate over a map m by, for k, v := range m { ... } and look for a key but is there a more efficient way of testing a key's existence in a map? I couldn't find the answer …

Read More
How can I convert a zero-terminated byte array to string?

I need to read [100]byte to transfer a bunch of string data. Because not all of the strings are precisely 100 characters long, the remaining part of the byte array is padded with 0s. If I convert [100]byte to string by: …

Read More
How to efficiently concatenate strings in go

In Go, a string is a primitive type, which means it is read-only, and every manipulation of it will create a new string. So if I want to concatenate strings many times without knowing the length of the resulting string, …

Read More