PEMDAS

PEMDAS is an acronym that stands for Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction. It is a popular mnemonic used to remember the order of operations when evaluating mathematical expressions.

What is PEMDAS?

PEMDAS specifies the order of operations when evaluating expressions with multiple operators. It ensures that the expression is evaluated in a specific and unambiguous manner.

• Parentheses should be evaluated first.
• Next, exponents should be evaluated.
• Then, multiplication and division should be evaluated from left to right.
• Finally, addition and subtraction should be evaluated from left to right.

Usage in programming

PEMDAS is an important concept in computer programming. Many programming languages follow the order of operations specified by PEMDAS when evaluating expressions.

For example, in Python:

result = 1 + 2 * 3 ** 2 / 6

The result of this expression is calculated as follows:

• 3 ** 2 is evaluated first, resulting in 9.
• 2 * 9 is evaluated next, resulting in 18.
• 18 / 6 is evaluated next, resulting in 3.
• 1 + 3 is evaluated last, resulting in 4.

Therefore, the value of result is 4.

Conclusion

PEMDAS is a mnemonic that helps programmers remember the order of operations when evaluating mathematical expressions. It’s important for ensuring that expressions are evaluated in a specific and unambiguous manner.