What is the difference between printf, sprintf and fprintf?

printf:
printf function is used to print character stream of data on stdout console.

Syntax:

 int printf(const char* str, ...); 

Example:

// simple print on stdout #include<stdio.h> int main() {    printf("hello geeksquiz");    return 0; }

Output:

 hello geeksquiz

sprintf:
Syntax:

int sprintf(char *str, const char *string,...); 

String print function it is stead of printing on console store it on char buffer which are specified in sprintf

Example:

// Example program to demonstrate sprintf() #include<stdio.h> int main() {     char buffer[50];     int a = 10, b = 20, c;     c = a + b;     sprintf(buffer, "Sum of %d and %d is %d", a, b, c);       // The string "sum of 10 and 20 is 30" is stored     // into buffer instead of printing on stdout     printf("%s", buffer);       return 0; }

Output:

Sum of 10 and 20 is 30

fprintf:
fprintf is used to print the sting content in file but not on stdout console.

int fprintf(FILE *fptr, const char *str, ...);

Example:

#include<stdio.h> int main() {     int i, n=2;     char str[50];       //open file sample.txt in write mode     FILE *fptr = fopen("sample.txt", "w");     if (fptr == NULL)     {         printf("Could not open file");         return 0;     }       for (i=0; i<n; i++)     {         puts("Enter a name");         gets(str);         fprintf(fptr,"%d.%s\n", i, str);     }     fclose(fptr);       return 0; }

Input: GeeksforGeeks
       GeeksQuiz
Output:  sample.txt file now having output as 
0. GeeksforGeeks
1. GeeksQuiz