ืื ืื "ฯ" ืืืชืืืืงื?
ืืืืก ืืื ืืืงืฃ ืืขืื ืืงืืืจื, ืืฉืืื ื-22/7 ืืืืืฆื ืืขืจื ืงืืืข ืฉื 3.14159, ื ืงืจื ืืืชืืืืงื "pi".ืื ืื Math.PI ื-Java?
Math.PI ืืื ืงืืืข ืืคืื ืกืืคื ืกืืื ื-Java, ืฉืืื ืขืจื ืืืชืืืืงื ฯ. ืืกืืคืง ืขื ืืื ืืืืงื java.lang.Math , ืงืืืข Math.PI ืืฉืืฉ ืืืืฆืืข ืืืฉืืืื ืืชืืืืื ืืืืขืืื ืืจืืืื ืืื ืืฆืืืช ืืฉืื ืืืืืงืฃ ืฉื ืืขืื ืื ืฉืื ืืคื ืื ืืื ืคื ืฉื ืืืืจ. ืืืืื ืืืืืชืืื, ืืืืืช "pi" ืืฉ ืขืืื ืืกืืกืืช ืขื ืฉืืืืฉืื ืืืชื ื ืืืจืื. ืืื ืืื ืืคืืจืืื ืืืื.- ืืขืฆืื ืชืขืืคื ืืืื ืืฉืชืืฉืื ื-pi ืืื ืืืฉื ืืช ืฉืื ืืืฃ ืืืืืก.
- ืืืข ืืจืคืืื ืืจืืืื ื-pi ืขื ืืื ืฉืืืืฉ ืื ืืื ืื ืชื ืืช ืืื ื ืืขืื.
- ืืืืืืืืื ืืฉืชืืฉืื ื-pi ืืื ืืืงืืจ ืืช ืืจืื ื-DNA.
- ืกืืืืกืืืงืืื ืืฉืชืืฉืื ื-pi ืืื ืืืงืจืื ืืช ืืื ืืืงืช ืืืืืืืกืืื ืฉื ืืืืื ื.
- ื-Pi ืืฉ ืขืจื ืืืื ืืืขืจืืช ืืืืงืื ืืืืืืืืช (GPS) ืื ืืืืืช ืฉืืฉ ืื ื ืืืื.
ืืืืื
ืื ืืชื ืจืืฆื ืืืืื ืืื ืืืฉืื ืืืืฆื ืืืฉืชืืฉ ืืขืจื ืฉื Math.PI ื-Java, ืืืื ื ืกืชืื ืขื ืืืืื ืืืคืขืื ืืืื.public class PiInJava {
public static double circumferenceOfCircle(int radius) {
return Math.PI * (2 * radius);
}
public static double areaOfCircle(int radius) {
return Math.PI * Math.pow(radius, 2);
}
public static double volumeOfSphere(int radius) {
return (4 / 3) * Math.PI * Math.pow(radius, 3);
}
public static double surfaceAreaOfSphere(int radius) {
return 4 * Math.PI * Math.pow(radius, 2);
}
public static void main(String[] args) {
int radius = 5;
System.out.println("Circumference of the Circle = " + circumferenceOfCircle(radius));
System.out.println("Area of the Circle = " + areaOfCircle(radius));
System.out.println("Volume of the Sphere = " + volumeOfSphere(radius));
System.out.println("Surface Area of the Sphere = " + surfaceAreaOfSphere(radius));
}
}
ืชึฐืคืึผืงึธื
ืืืงืฃ ืืืขืื = 31.41592653589793 ืฉืื ืืืขืื = 78.53981633974483 ื ืคื ืืืืืจ = 392.6990816987241 ืฉืื ืืคื ืื ืฉื ืืืืืจ = 314.15892793555927935
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