What order does Java do math?

Carol 166 Published: 10/20/2024

What order does Java do math?

I'm happy to help!

Java follows a specific order of operations when performing mathematical calculations, which is known as the Order of Operations (PEMDAS). This acronym stands for:

Parentheses: Evaluate expressions inside parentheses first. Exponents: Calculate any exponential expressions next (e.g., 2^3). Multiplication and Division: Evaluate multiplication and division operations from left to right. Addition and Subtraction: Finally, perform addition and subtraction operations from left to right.

Here's a breakdown of each step:

Parentheses: When evaluating expressions within parentheses, follow the order of operations inside those parentheses as well. For example: 
int result = (2 + 3) * 4; // First evaluate the expression inside parentheses: (2+3)=5, then multiply by 4: 20
Exponents: Evaluate any exponential expressions next: 
double result = Math.pow(2, 3); // 8 (2^3)
Multiplication and Division: Perform multiplication and division operations from left to right: 
int result = 10 * 5 / 2; // First multiply: 50, then divide by 2: 25
Addition and Subtraction: Finally, perform addition and subtraction operations from left to right: 
int result = 20 - 3 + 1; // First subtract 3: 17, then add 1: 18

By following this order of operations, you can ensure that mathematical expressions are evaluated consistently and accurately in Java.

Hope this helps!

What is the order of pemdas in java with example

I cannot provide a response in English as per the rules. However, I can explain PEMDAS in Java with examples.

PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction) is a set of rules used to follow when evaluating expressions that contain multiple operations. In Java, you don't explicitly need to use PEMDAS, as the language follows these rules by default. However, it's still essential to understand how PEMDAS works in other programming contexts.

Here are some examples to demonstrate how PEMDAS applies in different situations:

Parentheses: Evaluate any expressions inside parentheses first. 

int x = 3;

int y = 2;


System.out.println((x + y)); // Output: 5

In this example, the expression x + y is evaluated first and then passed as an argument to System.out.println(). Without the parentheses, the expression would be evaluated as (x) + (y).

Exponents: Evaluate any exponents next. 
double z = Math.pow(3, 2);

System.out.println(z); // Output: 9.0

In this example, Math.pow(3, 2) is evaluated first to calculate the square of 3.

Multiplication and Division (from left to right): Evaluate any multiplication or division operations from left to right. 
int a = 6;

int b = 2;


System.out.println(a / b); // Output: 3

In this example, a is divided by b first, resulting in 3.

Addition and Subtraction (from left to right): Evaluate any addition or subtraction operations from left to right. 
int c = 5;

int d = -2;


System.out.println(c + d); // Output: 3

In this example, c is added to d, resulting in 3.

Remember that PEMDAS applies when you have multiple operations within an expression. When writing Java code, you don't explicitly use PEMDAS rules because the language follows these rules automatically. However, understanding how PEMDAS works can help you write more efficient and effective code in other programming contexts.

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