CS 121 Lecture Notes - Lecture 34: Switch Statement

• School: Pace University
• Department: Computer Science
• Course: CS 121
• Professor: Shan

Document Summary

The switch statement: provides another way to make a selection from. First evaluates an expression, then based on the result, select the statements from several possible cases. case value1: case value2: case value3: switch (expression) case statement-list1 statement-list2 statement-list3: if expression matches value2, control jumps to there. Most situations, we want to execute only the first matched case. This is useful when all cases do not match, you want some by-default statements executed. So, the default case is placed at the end of the switch statement, & control will transfer to it if no other case value matches. The type of a switch expression must be integers, characters or enumerated types (java 7, also accepts strings). Relation between if-else & switch: case b"; case a"; switch (option) B = 66; case c"; acount++; break; bcount++; break; ccount++; break; if (option a") else if (option == b") acount++; bcount++; else ccount++;