What does this syntax of switch case mean?
c, switch-statement
Solution
It's a GNU C extension called case range.
http://gcc.gnu.org/onlinedocs/gcc/Case-Ranges.html
As noted in the document, you have to put spaces between the low and high value of the range.
case 1 ... 9:
statement;
is equivalent to:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
statement;
Problem
I saw some C code like this: ``` int check = 10: switch(check) { case 1...9: printf("It is 2 to 9");break; case 10: printf("It is 10");break; } ``` What does this `case 1...9:` mean? Is it standard?