atof - Converts string into float value(Addition of 2 Values) in C

  #include <stdlib.h>
  #include <stdio.h>
  int main(void)
  {
    char num1[80], num2[80];

    printf("Enter first: ");
    gets(num1);
    printf("Enter second: ");
    gets(num2);
    printf("The sum is: %lf.", atof(num1) + atof(num2));

    return 0;
  }


Output:
Enter first: 4
Enter second: 6
The sum is: 10.000000.