### Get Virtual Memory Info in Go

Source: https://github.com/shirou/gopsutil/blob/master/README.md

Demonstrates how to retrieve and print virtual memory statistics using the gopsutil/mem package. The output can be a formatted string or a JSON representation.

```go
package main

import (
    "fmt"

    "github.com/shirou/gopsutil/v4/mem"
)

func main() {
    v, _ := mem.VirtualMemory()

    // almost every return value is a struct
    fmt.Printf("Total: %v, Free:%v, UsedPercent:%f%%\n", v.Total, v.Free, v.UsedPercent)

    // convert to JSON. String() is also implemented
    fmt.Println(v)
}
```

--------------------------------

### Get and Print Disk Usage Statistics

Source: https://github.com/shirou/gopsutil/wiki/Disk-Usage-Example

This Go snippet retrieves disk partition information and then iterates through each partition to get and print its usage statistics. Ensure the gopsutil/disk package is imported. The check function handles errors by panicking.

```go
package main

import (
  "github.com/shirou/gopsutil/disk"
  "fmt"
  "strconv"
)

func main() {
  parts, err := disk.Partitions(false)
  check(err)

  var usage []*disk.UsageStat

  for _, part := range parts {
    u, err := disk.Usage(part.Mountpoint)
    check(err)
    usage = append(usage, u)
    printUsage(u)
  }
}

func printUsage(u *disk.UsageStat) {
  fmt.Println(u.Path + "\t" + strconv.FormatFloat(u.UsedPercent, 'f', 2, 64) + "% full.")
  fmt.Println("Total:  "  + strconv.FormatUint(u.Total/1024/1024/1024, 10) + " GiB")
  fmt.Println("Free:  "  + strconv.FormatUint(u.Free /1024/1024/1024, 10) + " GiB")
  fmt.Println("Used:  "  + strconv.FormatUint(u.Used /1024/1024/1024, 10) + " GiB")
}

func check(err error) {
  if err != nil {
    panic(err)
  }
}
```

--------------------------------

### Set Custom System Directory with Context in Go

Source: https://github.com/shirou/gopsutil/blob/master/README.md

Shows how to use a context to specify alternative locations for system directories, such as /proc, overriding environment variables and default paths. This feature requires gopsutil v3.23.6 or later.

```go
	ctx := context.WithValue(context.Background(), 
		common.EnvKey, common.EnvMap{common.HostProcEnvKey: "/myproc"},
	)
	v, err := mem.VirtualMemoryWithContext(ctx)
```

--------------------------------

### Access Platform-Specific Memory Info in Go

Source: https://github.com/shirou/gopsutil/blob/master/README.md

Illustrates how to use the `Ex` struct to access platform-specific memory details, such as `VirtualAvail` and `VirtualTotal` on Windows. This requires gopsutil v4.24.5 or later.

```go
ex := NewExWindows()
v, err := ex.VirtualMemory()
if err != nil {
    panic(err)
}

fmt.Println(v.VirtualAvail)
fmt.Println(v.VirtualTotal)

// Output:
// 140731958648832
// 140737488224256
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.