Basic types of 100 questions for basic grammar of Niuke

Niuke basic grammar must be brushed 100 Basic types of questions

Blog home page ： The blog home page of Beijing and JIUPU

Welcome to pay attention to the likes and comments

This article is original by Beijing and JIUPU ,csdn First episode ！

Series column ：java Study

Starting time ：2022 year 5 month 24 Japan

You do march and April , There will be an answer in August and September , Come on

Refer to the online programming website ： Cattle from

If you think the blogger's article is good , Please support the blogger for the third company

Last words , The author is a newcomer , Not doing well in many ways , Welcome the boss to correct , Study together , To rush

Navigation assistant

[TOC]

picture

BC3  Niuniu learns to speak - Integers

describe

Niuniu has just been born , cry piteously for food , At first he could only say simple numbers , You tell him an integer , He can learn at once .

Enter an integer , Output this integer .

Input description ：

Enter an integer , The scope is 32 Bit signed integer range

Output description ：

Output this integer

Example 1

Input ：

3


Output ：

3

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
 Scanner sc=new Scanner(System.in);
 
 int a=sc.nextInt();
 System.out.println(a);
 
 }
}


BC4  Niuniu learns to speak - Floating point numbers

describe

Can say integer after , Niuniu began to try floating point numbers （ decimal ）

Enter a floating point number , Output this floating point number .

Input description ：

Enter a floating point number

Output description ：

Output a floating point number , Keep three decimal places

Example 1

Input ：

1.359578


Output ：

1.360

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
 float a;
 Scanner sc=new Scanner(System.in);
 a=sc.nextFloat();
 System.out.println(String.format("%.3f",a));
 }
}


BC5  Niuniu learns to speak - character

describe

After floating point numbers , Niuniu began to try characters

Enter a character , Output this character .

Input description ：

Enter a character , The scope is ascii Within the scope of

Output description ：

Output this character

Example 1

Input ：

a


Output ：

a

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
 String c;
 Scanner sc=new Scanner(System.in);
 c=sc.nextLine();
 System.out.println(c);
 }
}


BC6  The second integer of Niuniu

describe

Niu Niu inputs three integers from the keyboard , And try to display the second integer on the screen .

Input description ：

One line input  3  It's an integer , Space off .

Output description ：

Please output the value of the second integer .

Example 1

Input ：

1 2 3


Output ：

2

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
 Scanner in=new Scanner(System.in);
 int a[]=new int[3];
 for(int i=0;i<a.length;i++){
 a[i]=in.nextInt();
 }
 System.out.println(a[1]);
 
 }
}