Multiplying float values “possible lossy conversion from double to float”

Question

I have this problem wherein I have to convert kilometers into miles. I\'m a novice programmer so bear with me.

Here\'s my code so far:

import java.ut         


        

Answer 1

The value 0.621371 is a double literal, so the km values is promoted to double when multiplied. Storing the double product back to m would be a conversion that could lose data (double to float).

To keep the data as a float, use a float literal, with a f on the end:

m=km*0.621371f;

Normally a double for the results would be just fine, so you could also just change the datatypes of m and km to double.

Answer 2

You need to define constant variable as a float, since km is read as a float.

final float KM_TO_ML = 0.621371F;
m = km * KM_TO_ML;

Answer 3

You are trying to set a double to a float variable

To fix, change this line

m=km*0.621371;

to

m=km*0.621371f;