how to use atoi() function in c.

Use of atoi () function:-

                                 atoi() is a  predefine function which is present in stdlib.h header file in c.It is for cover a string in integer value.

Example:-

 #include<stdio.h>
#include<stdlib.h>
int main()
{
    char str[19];
    int val;
    printf("Enter a string\n");
    scanf("%s",str);
    val=atoi(str);
    printf("Value of string in integer is %d",val);
    return(0);
}

input:-

 Enter a string 

 7889              

output:-

 Value of string in integer is 7889