In Go, you can define and parse integer command-line flags using the flag package. Here's an example of how to do it:
package main
import (
"flag"
"fmt"
)
func main() {
// Define an integer flag
count := flag.Int("count", 0, "number of items")
// Parse the command-line flags
flag.Parse()
// Access the value of the flag
fmt.Println("Count:", *count)
}
In this example, we define an integer flag using the Int function from the flag package. The Int function takes three arguments: the name of the flag, the default value, and a brief description.
After defining the flag, we call flag.Parse() to parse the command-line arguments and assign values to the defined flags.
To access the value of the flag, we use the dereference operator (*) to get the value stored at the memory address of the flag variable.
Assuming the above code is saved in a file named main.go, you can run it with the following command:
$ go run main.go -count 10
The output will be:
Count: 10
If you don't provide a value for the flag, it will use the default value (0 in this case).