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sprintf() in C
  • Difficulty Level : Easy
  • Last Updated : 02 Nov, 2020

Syntax: 

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

Return: 

If successful,
it returns the total number of 
characters written excluding 
null-character appended in the string, 
in case of failure a negative number 
is returned .

sprintf stands for “String print”. Instead of printing on console, it store output on char buffer which are specified in sprintf.

C

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// 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;
}

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Output

Sum of 10 and 20 is 30

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