8 Statements [stmt.stmt]

8.7 Jump statements [stmt.jump]

8.7.3 The continue statement [stmt.cont]

The continue statement shall occur only in an iteration-statement and causes control to pass to the loop-continuation portion of the smallest enclosing iteration-statement, that is, to the end of the loop.
More precisely, in each of the statements
while (foo) { { // ... } contin: ; }
do { { // ... } contin: ; } while (foo);
for (;;) { { // ... } contin: ; }
a continue not contained in an enclosed iteration statement is equivalent to goto contin.