Infix Notation: Understanding Symbols and Operators in Expressions

Infix means a symbol or operator that is placed inside an expression, between two operands, to modify their relationship. For example, in the expression 2 + 3 × 4, the multiplication operator × is an infix operator because it is placed between the two operands 3 and 4.

Infix notation is used in many programming languages, including C, C++, Java, and Python. It is also used in mathematical expressions, where infix operators are used to perform arithmetic operations, such as addition, subtraction, multiplication, and division.

Here are some examples of infix operators:

1. + (addition)
2. - (subtraction)
3. × (multiplication)
4. / (division)
5. % (modulus)
6. ^ (exponentiation)
7. & (concatenation)
8. | (or)
9. ~ (not)

Infix notation can be used to perform complex calculations and operations, such as:

1. 2 + 3 × 4 - 5 × 2 = ?
2. 2 × 3 + 4 - 5 = ?
3. 2 + 3 × 4 + 5 = ?

Infix notation is also used in regular expressions to match patterns in text. For example, the expression /^[a-zA-Z0-9]+$/ uses infix notation to match strings that consist only of letters and digits.