C-Character Set Dept. of Computer Applications Prof. Harpreet Kaur

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Presentation transcript:

C-Character Set Dept. of Computer Applications Prof. Harpreet Kaur Govt College Dera Bassi

C-Character Set It is a set of all the alphabets, digits and special symbols used in C language which are: Alphabets – A to Z, a to z Digits – 0 to 9 Special symbols - , . ; : @ # $ % { } etc

TOKENS When the compiler is processing the source code of a C program, each group of characters separated by white space is called as a token. A token is source program text that the compiler does not break down into separate elements.

IDENTIFIERS Both uppercase and lowercase letters can be used but have different meaning. Eg. : Area, average, sum, SUM, MARKS, M5.e6 etc, are all valid identifiers, whereas 6th, basic- pay, d.a, h-r-a, t a are invalid identifiers because they all have invalid character in it.

IDENTIFIERS They have same rules to construct as the rules for constructing variables names. IDENTIFIERS are the names given to various elements of program such as variables, functions, arrays,unions etc.