whie和for exp1 while(exp2 语句; xp3 While(表达式) for(exp1; exp2; exp3) 句; 语句; sum=0 sum=0 for(=1;i<=10;i++) while(i<=10) sum=sumtI sum=sum+ H++;while 和 for while (表达式) 语句； for (exp1; exp2; exp3) 语句; exp1; while(exp2{ 语句; exp3; } sum=0; i=1; while(i<=10){ sum=sum+i; i++; } sum=0; for(i=1; i<=10; i++) sum=sum+i;