【问题】

有时候，做一个循环，但遇到某种情况下便中止。

有时候，中止下面命令，返回进行下一次循环。

有时候，中止全部循环。

【方法】

continue满足上面一个中止；

continue,break满足下面一个中止。

【例子】

forvalues x = 1/10 {
if mod(`x',2) {
display "`x' is odd"
continue
}
display "`x' is even"
}

*would produce the same results as

forvalues x = 1/10 {
if mod(`x',2) {
display "`x' is odd"
}
else {
display "`x' is even"
}
}

*The break option allows you to prematurely exit the loop.

forvalues x = 6/1000 {
if mod(`x',2)==0 & mod(`x',3)==0 & mod(`x',5)==0 {

di "The least common multiple of 2, 3, and 5 is `x'"
continue, break
}
}

*The loop is executed over the values of 6 to 30 instead of to 1000.