Atoi() - C library function Program

Declaration :

int atoi(const char *str)

Explanation :

Purpose	The C library function *int atoi(const char str) converts the string argument str** to an integer (type int).
Parameters	str ===> This is the string representation of an integral number.
Return Value	This function returns the converted integral number as an int value. If no valid conversion could be performed it returns zero.
Exception

C Program : Example

The following example shows the usage of atoi() function.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
   int value;
   char str[20];
   strcpy(str, "1234");
   value= atoi(str);
   printf("\nString equivalent value of %s = %d", str, value);
   strcpy(str, "pritesh");
   value= atoi(str);
   printf("\nString equivalent value of %s = %d", str, value);
   return(0);
}

Output :

String equivalent value of 1234 = 1234
String equivalent value of pritesh = 0