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1. Switch statement format:
switch(表达式){ case 值1: 语句体1; break; case 值2: 语句体2; break; ... default: 语句体n+1; break; }
2. Format explanation:
Expression:byte, short, int, char
# Case The value latter: It is the content used for matching the value of the expression
# Break
: The meaning of the table interruption
default
: When all values do not match, the statement body default is executed;
3. Execution process:
A: First calculate the value of the expression
##3. Execution process:B: Compare the calculated value according to the value behind the case. Once there is a match, the corresponding statement is executed, and it is over when it encounters Break.
C: If all cases do not match, execute statement body n 1
4. Example code:
Scanner sc= new Scanner(System.in); System.out.println("请输入数字1-7"); int i = sc.nextInt(); switch(i) { case 1: System.out.println("星期一"); break; case 2: System.out.println("星期二"); break; case 3: System.out.println("星期三"); break; case 4: System.out.println("星期四"); break; case 5: System.out.println("星期五"); break; case 6: System.out.println("星期六"); break; case 7: System.out.println("星期天1"); break; default: System.out.println("请输入正确数字:"); break;
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