Using Java to understand program logic (5)

No (4) I was in accordance with the chapter, the fourth chapter is not good to organize, pay attention to

switch:1, can only be judged as equivalent 2, can only match int and Char

Input.hasnextint (); Determines whether the input value is a number is a number returned true not a number returns false

Debug 3 steps: 1, set breakpoint 2, start debugging 3, observe variables

Equals: used to compare strings

Scanner input=new Scanner (system.in);

String ok= "n";//default Teacher not satisfied

While (ok.equals ("n")) {

System.out.println ("see theory in the morning");

System.out.println ("the Afternoon Knock code");

System.out.print ("\ N qualified? y/n:");

Ok=input.next ();

}

System.out.println ("qualified!") ");

While and do while Loops:

While (condition) {...} ==>while Loop features: first judgment and execution
do{....} While (condition); ==>do. While loop features: first execution after judgment

Reverse Output:
int a=12345;
System.out.println (a);
While (a!=0) {
int Y=A%10;//1
System.out.print (y);//54321
a=a/10;//0
}

For (initialize; condition; accumulate, Subtract) {...}
For (1;2;4) {//the order of execution is: 1234234234234234234234 .....
3
}
For (int I=1;i<=100;i++) {//101
System.out.println ("+i+" time to study well!) ");
}

Break: End the entire loop

Continue: ends the current loop and goes directly to the next loop

Using Java to understand program logic (5)