Variables in C
- 1. Variables in ‘C’ Language By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 1
- 2. Variable A data name that may be used to store a data value. Uses the primary storage area. Value vary during the execution time. May take different values at different times. Basically memory locations which are given names and referred in the program by variable names. Are used for identification for entering the information and data. Must be in a meaningful way to reflect its function and nature in the program. By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 2
- 3. Variable may consist of Letters Digits Underscore(_) By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 3
- 4. Examples of Variable Average height Total Counter_1 Class_strength distance By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 4
- 5. Rules for defining a variable Must begin with a letter Some systems permit underscore as a first character. Length can be maximum up to 31 characters. Uppercase and lowercase letters are significant. White space is not allowed. By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 5
- 6. Examples of valid and invalid variable names: • John • mark • x1 • T_raise • ph_value Valid • 123 • % • (area) • 25th Invalid By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 6
- 7. ThankYou By: Satveer Kaur, Assistant Professor, Khalsa College, Patiala. 7