Basic Java syntax and java syntax

Basic Java syntax and java syntax
Loop

Use a for loop to calculate the value of 1 + 3 + 5 + 7 +... + 99 and output the calculation result.

Calculate 1 with a for loop! + 2! + 3! +... + 10! And output the calculation result.

Output 1 ~ The first five in 100 can be divided by three.

Output 101 ~ Prime number within 200.

// Use a for loop to calculate the value of 1 + 3 + 5 + 7 +... + 99 and output the calculation result. Public class Test {/*** @ param args */public static void main (String [] args) {// TODO Auto-generated method stub int add = 0; for (int I = 1; I <= 99; I + = 2) {add + = I;} System. out. println ("1 + 3 + 5 + 7 +... + 99 = "+ add );}}

Printed result:

1+3+5+7+...+99 = 2500

1 // calculate 1 with a for loop! + 2! + 3! +... + 10! And output the calculation result. 2 public class Test {3/** 4 * @ param args 5 */6 public static void main (String [] args) {7 // TODO Auto-generated method stub 8 long result = 0; 9 long f = 1; 10 for (int I = 1; I <= 10; I ++) {11 f = f * I; 12 result + = f; 13 14} 15 System. out. println ("1! + 2! + 3! +... + 10! = "+ Result); 16} 17}

Printed result:
1! + 2! + 3! +... + 10! = 4037913

1 // output 1 ~ The first five in 100 can be divided by three. 2 public class Test2 {3 4/** 5 * @ param args 6 */7 public static void main (String [] args) {8 // TODO Auto-generated method stub 9 int num = 0, I = 1; 10 while (I <= 100) {11 if (I % 3 = 0) {12 System. out. println (I + ""); 13 num ++; 14} 15 if (num = 5) 16 break; 17 I ++; 18} 19 20} 21 22}
Print result:

3
6
9
12
15

1 // outputs 101 ~ Prime number within 200. 2 public class Test2 {3 4/** 5 * @ param args 6 */7 public static void main (String [] args) {8 // TODO Auto-generated method stub 9 for (int I = 101; I <200; I ++ = 2) {10 boolean f = true; 11 for (int j = 2; j <I; j ++) {12 if (I % j = 0) {13 f = false; 14 break; 15} 16} 17 if (! F) 18 continue; 19 System. out. print ("" + I); 20} 21} 22}

 

Basic Java syntax

What's more? The basic syntax is similar to the C language, except that a basic String data type is added to the basic syntax without a pointer.
 
Basic JAVA syntax

This is not a matter of books. You just need to repeat your own code. You have the foundation of C # and learn it quickly.
I really want to find a book. Let's look at the JDK help documentation. In fact, it's not messy. It's hard to learn it by myself.