Explain each line of code, which find the exponential of a number using Taylor series expansion in C programming

1 #include 2 #include 3 #include 4 float factorial(float n) 5 { 6 if (n==0) { 7 return 1; 8 } 9 float result = n * factorial(n-1); 10 return result; 11 } 12 int main(int argc, char **argv) 13 { 14 float n = atof(argv[1]); 15 float sum = n; 16 for (float k=1; k