Average, tallest and smallest heights.

Heights.java

package qub.ac.uk.practical.week5;

public class PracticalFiveQuestionThree {
	
	/**
	 * A method which calculates various statistics of students from an array
	 * @param args
	 */
	public static void main(String[] args) {
		// Declaring vars to hold average height, tallest and smallest
		double average=0;
		double tallest=0;
		double smallest=0;


		// Populate array with student heights
		double [] stuHeightArray = { 1.4, 1.9, 1.31, 1.2 };
		
		// Calculate average height
		for (double i : stuHeightArray){
			average += i/stuHeightArray.length;
		}
		// Calculate tallest student
		for (int counter=0; counter<stuHeightArray.length;counter++){
			if (stuHeightArray[counter] > tallest){
				tallest = stuHeightArray[counter];
			}
		}
		// Calculate smallest student
		smallest = stuHeightArray[0];
		for (int counter=0; counter<stuHeightArray.length; counter++){
			if (stuHeightArray[counter] < smallest){
				smallest = stuHeightArray[counter];
			}
		}
		// Printing values
		System.out.println("Average height of the class is: "+Math.round(average*100.0)/100.0);
		System.out.println("The height of the tallest student is: "+tallest);
		System.out.println("The height of the smallest student is: "+smallest);
	}
}