Float

Programming Questions

taniaca

in Programming Questions • 1 year ago

Hey Guys I have a question. My professor gave us this example in class

int total;
float average;
total = 12+25+36+15;
average = total / 4;
print ("The average is ");
print (average);

and the average printed out to 22. However, why did he do float, even is you do int average you get the same answer.
Any help will be greatly appreciated.

Also when do you use float ? And what is float ?

Replies(4)

PhiLho

Re: Float

1 year ago

Change 15 to 16: you get the same result. The float type of average isn't actually used... Now change / 4 to / 4.0: the result changes.
That's because the division was an integer division (leaving an integer), converted after division to a float.
While if you divide by 4.0, you mark the number as being a float, and the division will (more or less) exact, with decimal point. A float is just that: a number with a decimal point.
11 / 2 = 5
11 / 2.0 = 5.5

taniaca

Re: Float

1 year ago

So when you do float function you can use numbers with decimal points in them ? Because I tried doing int function and then changing 15 to 16 and it gave me error saying can not change float to int.

taniaca

Re: Float

1 year ago

int x = 1;
int y = 2;
float result = x/y;
print(result);

I did float but it keeps on printing 0.0 why ?

calsign

Re: Float

1 year ago

Both numbers are integers, thus integer division occurs, even if you are assigning it to a float value.
You could change one or both of the ints to be a float, or convert one or both of the ints to be floats.

For example:

float x = 1;
float y = 2;
float result = x/y;
print(result);

or:

int x = 1;
int y = 2;
float result = float(x)/float(y);
print(result);

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