Handling stdin in Go

Internal

• Go Code Examples
• Go Strings
• fmt Package

Handling stdin with fmt Functions

fmt.Scan()

https://golang.org/pkg/fmt/#Scan

Read text from stdin, storing successive space-separated values into successive arguments. Newlines count as space. It returns the number of items successfully scanned. If that is less than the number of arguments, err will report why.

var s string
cnt, err := fmt.Scan(&s)
fmt.Printf("input line: %s, cnt: %d, error: %s\n", s, cnt, err)

fmt.Scanln()

https://golang.org/pkg/fmt/#Scanln

Scanln is similar to Scan, but stops scanning at a newline and after the final item there must be a newline or EOF.

var line string
fmt.Scanln(&line)

fmt.Scanf()

https://golang.org/pkg/fmt/#Scanf

var f float
cnt, err := fmt.Scanf("%f", &f)