**Contents**show

## How do you square in Java?

**You can square a number in Java in two different ways:**

- Multiply the number by itself.
- Call the Math. pow function.

## How do you program the area of a square?

**Program :**

- int main() {
- int side, area;
- printf(“nEnter the Length of Side : “);
- scanf(“%d”, &side);
- area = side * side;
- printf(“nArea of Square : %d”, area);
- return (0);

## What is nextDouble in Java?

The nextDouble() is a method of Java Scanner class which **is used to scan the next token of the input as a double**. If the translation is successful, the scanner past the input that matched.

## What is the formula of circle in Java?

The formula for calculating area of a circle is, **Area = PI * r * r**, where PI is a constant and r is the radius of the circle.

## What is the area and perimeter of a square?

Answer: The **area of a square is equal to the square of the length of its side and the perimeter of the square is 4 times the length of its side**. Let the length of the side of a square be ‘a’ units.

## How do you code a perimeter in Java?

**JAVA**

- public class Main.
- {
- public static void main (String args[])
- { float a ,b, c, d, perimeter;
- a=c= 5;
- b=d=4;
- perimeter = 2*(a+b);
- System.out.println(“Perimeter of Rectangle is: “+perimeter);

## How do you write square root in Java?

Java sqrt() method with Examples

Math. sqrt() returns the square root of a value of type double passed to it as argument. If the argument is NaN or negative, then the result is NaN. If the argument is positive infinity, then the result is positive infinity.

## How do you square a number?

To square a number: **just multiply it by itself**. A square number is the number we get after multiplying an integer (not a fraction) by itself.

## What is an algorithm to find area of square?

In order to calculate area of a square, ‘A’ be the area of square and the length of the square be ‘a’. Then we need to calculate **A= a*a**. Step 2 :- Accept as input, the length of the sides of the square, and store the value in variable a. Step 3 :- Calculate the area of the square (a*a) and store in a variable A.

## How do you program the area of a rectangle?

**C Program**

- #include <stdio.h>
- int main()
- {
- int width=5;
- int height=10;
- int area=width*height;
- printf(“Area of the rectangle=%d”,area);
- }