Tokens in C++
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This document discusses the five main types of tokens in C++ - keywords, variables, constants, strings, and operators. It provides definitions and examples of each token type. Keywords are reserved words that cannot be used as variable names, while variables store values that can change. Constants represent fixed values, strings group characters within double quotes, and operators perform actions on operands like arithmetic, comparison, and assignment.
![Definition:
A group of characters that are treated as a single data
item enclosed in double quotes are known as strings.
General syntax:
• char string-name[size];
• size determines the number of characters in the string
name.
Example: char city[9]=“New York”;
STRINGS](https://image.slidesharecdn.com/tokens-170318023816/85/Tokens-in-C-13-320.jpg)
Tokens in C++
- 1. Presented by • Divya Sree • Rayshini • Issac • Mahender TOKENS
- 2. Tokens are the basic building blocks in C++ language. The smallest individual units in a program are known as tokens. A program is constructed using a combination of these tokens. TOKENS
- 5. Definition: Sequence of characters that have a fixed meaning. Keywords must be written in lower case. Reserved identifiers and can’t be used as names for the program variables user-defined program elements. KEY WORDS Examples: int, float, char, double, switch, break, char, const, Continue, default, for, if, goto, static, void, sizeof, while, return, int, long, do, while etc…
- 7. Definition: A variable is a quantity whose value may change during the program execution. Examples: int a, char choice, etc., VARIABLES Variables in C++ Numeric Variables To store either integer values or floating point values Character Variables Alphabets and numbers from 0-9 inserted between single quotes
- 8. Naming Conventions: A variable name should • contain alphabets (a-z , A-Z) and digits (0-9). • not start with a number or a digit. • not be a keyword. • case sensitive.
- 9. Naming Conventions: A variable name should • contain alphabets (a-z , A-Z) and digits (0-9). • not start with a number or a digit. • not be a keyword. • case sensitive.
- 11. CONSTANTS Definition: The quantities whose value do not change during the program execution are known as constants.
- 13. Definition: A group of characters that are treated as a single data item enclosed in double quotes are known as strings. General syntax: • char string-name[size]; • size determines the number of characters in the string name. Example: char city[9]=“New York”; STRINGS
- 15. Definition: An operator is a symbol that performs operations on one or more operants. There are 8 types of operators supported by C++ language. OPERATORS
- 16. • Arithmetic operators (+,-,*,/,%) • Relational operators (==,!=,<,>,<=,>=) • Logical operators (||,&&,!) • Conditional operators (? :) • Assignment operators (=,+=,-=,/=,*=,%=,) • Increment /decrement operators (++,--) • Bitwise operators (&,|,^,<<,>>,~) • Miscellaneous/special operators (sizeof,*,->) EIGHT TYPES OF OPERATORS