if statement does not work with fraction, but works with decimal equivalent

Question

I'm trying to trouble shoot a problem with my code and narrowed it down to my if statement not working with a fraction.

The below code does not work and returns 0

for(float i=0; i <= 1; i += .0001){
 t += .0001;
 if(t >= 1/440){ //Fraction
   t = 0;
 }
 Serial.println(t*100);
 delay(100);
}

But when I replace the 1/440 with its decimal equivalent (.0022727) it works fine and counts from 0 to 2.2

for(float i=0; i <= 1; i += .0001){
 t += .0001;
 if(t >= 0.0022727){ //Decimal
   t = 0;
 }
 Serial.println(t*100);
 delay(100);
}

If there is a simple way to use a fractional value instead of a decimal value it would make my application much similar. Thanks.

Answer 1

1/440 will be treated as an integer expression, returning zero.

To make it work, make one or both operands a floating-point type. In your case:

 if(t >= (float)1 / 440){ //Fraction
   t = 0;
 }

Or:

 if(t >= 1.0/440){ //Fraction
   t = 0;
 }