C Programming - Declarations and Initializations - Discussion

Modulus support only integers. For ex: If we take 16.25/2.5 then in modulus it take only 16 from 16.25 and from 2.5 it takes 2 and gives answer 4. It performs on integers only.

fmod gives reminder in float.

Hope it clear.

Please tell me what is the use of fmod?

Is fmod used in PHP?

Nice explanation @Prem Kumar. Thank you.

This is the synopsis for fmod and fmodf:

#include <math.h>
double fmod(double x, double y)
float fmodf(float x, float y)

//The fmod() function computes the floating-point remainder of x/y.

An application wishing to check for error situations should set error number to 0 before calling fmod(). If an error is non-zero in return, or the return value is NaN, an error has occurred.

The fmodf() function is a single-precision version of fmod().

@Ajith and @Rey

rem is just the variable name for Remainder.It is not a function or anything and it's not compulsory to write rem. You can use any variable name. Like R, A, Remain, B etc like literally anything expect keywords.

@Anjali

return 0 is used to denote that you are not returning any arguments from that function.
Eg; you declare int main it means that your main is of int datatype so it must return some value.
but if you declare return 0 it says you are not returning any value. You can use void instead of writing return 0.

Example 1:

int main()
{
printf("My name is Ron\n");
return 0;
}

Example 2:

void main()
{
printf("My name is Ron\n");
}

@Gayathridhiravidamani.

In your first program, you have declared the variable a, b & c as float but you have used the format specifier as %d. You cannot use %d for floating point numbers. You have to use %f for float. That is why your program is showing error.

In your second program, you have done it rite, but you took % for finding the remainder of 3.14% 2.1% in for int, for float you have to use fmod () and you have use %d there. So, the compiler will take 3 from 3.14 and 2 from 2.1. So, 3%2 is 1.

fmod() function is used to find out remainder of float numbers, not integer and normal operation like rem=12%7, it gives remainder only integer not float.

So option 1 is wrong and the correct is c.

I think you understand.

What does the fmod represent here?

How could the answer be c but not a?

C is the correct answer as % operator don't work on floating point numbers so A is incorrect.