#include<stdio.h>
#include<stdlib.h>

int main()
{
 char str[] = "12.54";
 float n;
 
 n = atof(str);
 
 printf("String value is %s \n",str);
 printf("Number is %f \n",n);

 return 0;
}

OUTPUT:

String value is 12.54
Number is 12.540000