# How to calculate average in java ## How do you calculate your average?

The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

## How do you find the sum and average in Java?

Java Program to Calculate Sum & Average of an Array

1. public class Sum_Average.
2. int n, sum = 0;
3. float average;
4. Scanner s = new Scanner(System.
5. System. out. print(“Enter no. of elements you want in array:”);
6. n = s. nextInt();
7. int a[] = new int[n];
8. System. out. println(“Enter all the elements:”);

## How do you find the average of 3 numbers in Java?

However if you are not taking input from user then you can declare the data type based on the number value, for example if you want to find out the average of three integer numbers then you are declare num1, num2 & num3 as int but you have to use double as the return type of the avr method because the average of 3 int …

If it is a number scale (3.75, 2.5, 1.0, etc…) you should multiply the decimal total by the perfect score. For example, if your decimal average was . 82, and you are graded on a 4 point scale (as GPAs are), multiply the decimal by 4. This will give you your grade on a 4 point scale.

## What is the formula to calculate average percentage?

Calculate the percentage average: To find the average percentage of the two percentages in this example, you need to first divide the sum of the two percentage numbers by the sum of the two sample sizes. So, 95 divided by 350 equals 0.27. You then multiply this decimal by 100 to get the average percentage.

## Can you use += in Java?

As long as x and y are of the same type (for example, both are int s), you may consider the two statements equivalent. However, in Java, x += y is not identical to x = x + y in general. += performs an implicit cast, whereas for + you need to explicitly cast the second operand, otherwise you’d get a compiler error.

## How do you divide in Java?

// Divide a literal by a literal; result is 5 int result = 10 / 2; // Divide a variable by another variable; result is 3 int a = 15; int b = 5; int result = a / b; When dividing integer types, the result is an integer type (see the previous chapter for the exact data type conversions for mathematical operations).

## How do you calculate sum in Java?

sum += num; Means that your sum which is declared 0 is added with num which you get from the console. So you simply make this: sum=sum+num; for the cycle. For example sum is 0, then you add 5 and it becomes sum=0+5 , then you add 6 and it becomes sum = 5 + 6 and so on.

## How do you calculate grades in Java?

To calculate the grade of a student on the basis of his/her total marks in Java Programming, you have to ask to the user to enter the marks obtained in some subjects (5 subjects here), then calculate the percentage and start checking for the grades to display the grade on the output screen.

## How do you calculate perimeter in Java?

Java Program to Find the Perimeter of a Circle, Rectangle and Triangle

1. public class Perimeter.
2. int r, l, b, s1, s2, s3;
3. double pi = 3.14,perimeter;
4. Scanner s = new Scanner(System.
5. void circle()
6. System. out. print(“Enter radius of circle:”);
7. r = s. nextInt();
8. perimeter = 2 * pi * r;