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 the "fmt" package in order to use these functions.
 

Syntax:  

func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error)

Parameters: This function accepts three parameters which are illustrated below- 
 

• w io.Writer: This is the specified standard input or output.
• format string: This is containing some strings including verbs.
• a ...interface{}: This is the specified constant variables used in the code.

Return Value: It returns the number of bytes written and any write error encountered.
Example 1:
 

Output: 
 

GeeksforGeeks is a CS portal.
30 bytes written.
<nil>

Example 2:
 

Output: 
 

5 + 10 = 15.
13 bytes written.
<nil>