Why output of the following code is false ?

Question

#include<stdio.h>
//#include<conio.h>
int main(){
float f=0.1;
if(f==0.1)
printf("True");
else
printf("False");
return 0;
}

Answer 1

f is a float.
0.1 is a double.

Also see here:
https://www.geeksforgeeks.org/comparison-float-value-c/