for循环是不是和do while循环一样都是先执行？

Answer 1

Is the for loop executed first like the do while loop? -PHP Chinese website Q&A-Is the for loop executed first like the do while loop? -PHP Chinese website Q&A

Please watch and learn.

Answer 2

for(表达式1;表达式2;表达式3){

循环代码

}

先执行表达式1和表达式2 ,再到表达3去判断

do{

循环代码

}while(条件)

而do while 则是先执行一次,到while时在判断