keywords and identifiers
Download as PPTX, PDF0 likes77 views
Identifiers in C refer to names of variables, functions, and arrays. They are user-defined names that consist of letters, digits, or underscores, with a letter as the first character. Identifiers follow certain rules: the first character must be a letter, they can only contain letters, digits, or underscores, only the first 31 characters are significant, keywords cannot be used, and white spaces are not allowed. Common keywords in C include double, else, enum, extern, float, for, goto, if, int, long, register, return, short, signed, sizeof, static, auto, break, case, char, const, continue, default, do, struct, switch, typedef, union, unsigned,
1 of 6
Download to read offline
keywords and identifiers
- 1. KEYWORDS & IDENTIFIERS By: Satveer Kaur,Assistant Professor, Khalsa College, Patiala. 1
- 2. Keywords By: Satveer Kaur,Assistant Professor, Khalsa College, Patiala. 2
- 3. List of Keywords By: Satveer Kaur,Assistant Professor, Khalsa College, Patiala. 3 double else enum extern float for goto if int long register return short signed sizeof static auto break case char const continue default do struct switch typedef union unsigned void volatile while
- 4. Identifiers • Refer to the names of variable, functions, and arrays. • Are user-defined names . • Consist of a sequence of letters and digits, with a letter as a first character. • Both uppercase and lowercase are permitted. • Lowercase letters are commonly used. • Underscore character is also permitted and used as a link between two words for a long identifier. By: Satveer Kaur,Assistant Professor, Khalsa College, Patiala. 4
- 5. Rules for Identifiers First character must be an alphabet. Must consist of only letters, digits, or underscore. Only first 31 characters are significant. Cannot use a keyword. Must not contain white space. By: Satveer Kaur,Assistant Professor, Khalsa College, Patiala. 5
- 6. THANKYOU By: Satveer Kaur,Assistant Professor, Khalsa College, Patiala. 6