go type conversion
To convert a value from one type to another in Go, you can use type conversion. Type conversion allows you to convert a value of one type to a different type, as long as the two types are compatible.
To perform a type conversion in Go, you need to use the syntax <type>(<value>)
, where <type>
is the type you want to convert to, and <value>
is the value you want to convert.
Here are the steps involved in performing a type conversion in Go:
Identify the source value and target type: Determine the value that you want to convert and the type you want to convert it to.
Check for compatibility: Ensure that the source value and target type are compatible for conversion. In Go, you can only convert between compatible types. For example, you can convert an
int
to afloat64
, but you cannot convert astring
to anint
directly.Perform the type conversion: Use the type conversion syntax
<type>(<value>)
to perform the conversion. Replace<type>
with the target type and<value>
with the source value.Assign the converted value: Store the converted value in a variable if you want to use it later. You can assign the converted value to a new variable or overwrite an existing variable.
Here's an example that demonstrates type conversion in Go:
package main
import (
"fmt"
)
func main() {
var num int = 42
var floatNum float64
floatNum = float64(num) // Type conversion from int to float64
fmt.Println(floatNum) // Output: 42.0
}
In this example, we have an int
variable num
with a value of 42
. We want to convert this int
value to a float64
. We perform the type conversion using float64(num)
, and assign the converted value to the floatNum
variable. Finally, we print the value of floatNum
, which will be 42.0
.
Remember to ensure that the types you're converting between are compatible, otherwise you may encounter a compilation error.