C program for converting string to an integer using atoi() function:
#include<stdio.h>
#include<stdlib.h>
int main(){
char str[50];
int number;
//Accepting a numer in string format
printf("Enter any number as a string : ");
scanf("%s",str);
//Converting string into the number;
number = atoi(str);
if(number==0 && str[0]!='0')
printf("\nInvalid number");
else
printf("\n Equivalent number is : %d",number);
return 0;
}
OUTPUT:
Enter any number as a string : 23anil Equivalent number is : 23
