Learn about operators and expressions from "summary" of C/C++ Programmer's Reference by Herbert Schildt
Operators and expressions are fundamental concepts in programming languages like C and C++. They form the building blocks of any program and are used to perform various operations on data. An operator is a symbol that represents a specific action to be performed, such as addition or multiplication. An expression, on the other hand, is a combination of operators and operands that evaluates to a single value. In C and C++, operators can be classified into several categories based on their functionality. For example, arithmetic operators are used to perform mathematical operations like addition, subtraction, multiplication, and division. Relational operators are used to compare two values and determine their relationship, such as equality or inequality. Logical operators, on the other hand, are used to combine multiple conditions and determine the overall truth value. Expressions in C and C++ can be simple or complex, depending on the number of operators and operands involved. Simple expressions typically involve a single operator and a few operands, while complex expressions may involve multiple operators and operands. It is important to understand the precedence and associativity of operators in order to correctly evaluate expressions. In C and C++, expressions are evaluated based on a set of rules known as operator precedence and associativity. Operator precedence determines the order in which operators are evaluated, while associativity determines the order in which operators of the same precedence are evaluated. For example, multiplication has a higher precedence than addition, so in the expression 2 + 3 * 4, the multiplication is evaluated first. Understanding operators and expressions is essential for writing efficient and error-free code in C and C++. By mastering these concepts, programmers can manipulate data effectively and perform complex computations with ease. Practice and experimentation are key to developing proficiency in using operators and expressions in C and C++.
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