fmt.Fscanf() Function in Golang With Examples Last Updated : 05 May, 2020 Comments Improve Suggest changes Like Article Like Report In Go language, fmt package implements formatted I/O with functions analogous to C's printf() and scanf() function. The fmt.Fscanf() function in Go language scans the specified text, read from r and then stores the successive space-separated values into successive arguments as determined by the format. Here newlines in the input must match newlines in the format. Moreover, this function is defined under the fmt package. Here, you need to import the "fmt" package in order to use these functions. Syntax: func Fscanf(r io.Reader, format string, a ...interface{}) (n int, err error) Parameters: This function accepts three parameters which are illustrated below: r io.Reader: This parameter contains the scanned specified texts. format string: This parameter contains different formats for receiving the elements. a ...interface{}: This parameter is the specified variable for each elements. Returns: It returns the number of items successfully parsed. Example 1: C // Golang program to illustrate the usage of // fmt.Fscanf() function // Including the main package package main // Importing fmt, io and strings import ( "fmt" "os" "strings" ) // Calling main func main() { // Declaring some type of variables var ( i int b bool s string ) // Calling the NewReader() function to // specify some type of texts. // variable "r" contains the scanned texts r := strings.NewReader("10 false GFG") // Calling the Fscanf() function to receive // the scanned texts n, err := fmt.Fscanf(r, "%d %t %s", &i, &b, &s) // If the above function returns an error then // below statement will be executed if err != nil { fmt.Fprintf(os.Stderr, "Fscanf: %v\n", err) } // Printing each type of scanned texts fmt.Println(i, b, s) // It returns the number of items // successfully scanned fmt.Println(n) } Output: 10 false GFG 3 Example 2: C // Golang program to illustrate the usage of // fmt.Fscanf() function // Including the main package package main // Importing fmt, io and strings import ( "fmt" "os" "strings" ) // Calling main func main() { // Declaring some type of variables var ( i int b bool s string f float32 ) // Calling the NewReader() function to // specify some type of texts. // variable "r" contains the scanned texts r := strings.NewReader("46 true 3.4 GeeksforGeeks") // Calling the Fscanf() function to receive // the scanned texts n, err := fmt.Fscanf(r, "%d %t %g %s", &i, &b, &f, &s) // If the above function returns an error then // below statement will be executed if err != nil { fmt.Fprintf(os.Stderr, "Fscanf: %v\n", err) } // Printing each type of scanned texts fmt.Println(i, b, f, s) // It returns the number of items // successfully scanned fmt.Println(n) } Output: 46 true 3.4 GeeksforGeeks 4 Comment More infoAdvertise with us Next Article fmt.Fscanf() Function in Golang With Examples K Kanchan_Ray Follow Improve Article Tags : Go Language Golang-fmt Similar Reads fmt.Fscan() Function in Golang With Examples In Go language, fmt package implements formatted I/O with functions analogous to C's printf() and scanf() function. The fmt.Fscan() function in Go language scans the specified text, read from r, and then stores the successive space-separated values into successive arguments. Here newlines get counte 3 min read fmt.Fscanln() Function in Golang With Examples In Go language, fmt package implements formatted I/O with functions analogous to C's printf() and scanf() function. The fmt.Fscanln() function in Go language scans the specified text, read from r and then stores successive space-separated values into successive arguments. This function stops scannin 3 min read fmt.Fprintf() Function in Golang With Examples In Go language, fmt package implements formatted I/O with functions analogous to C's printf() and scanf() function. The fmt.Fprintf() function in Go language formats according to a format specifier and writes to w. Moreover, this function is defined under the fmt package. Here, you need to import th 2 min read fmt.Fprint() Function in Golang With Examples In Go language, fmt package implements formatted I/O with functions analogous to C's printf() and scanf() function. The fmt.Fprint() function in Go language formats using the default formats for its operands and writes to w. Here Spaces are added between operands when any string is not used as a par 3 min read fmt.Fprintln() Function in Golang With Examples In Go language, fmt package implements formatted I/O with functions analogous to C's printf() and scanf() function. The fmt.Fprintln() function in Go language formats using the default formats for its operands and writes to w. Here Spaces are always added between the specified operands and a newline 3 min read Like