Please choose odd one out please tell fast
2 answers:
You might be interested in
Answer:
Explanation:
Below is a little explanation to guide us through;
There are 4 nested methods : level 0, level 1, level 2, and level 3.
Before the methods, there's a global variable defined that can be accessed by all the methods.
Level 0:
This method uses global variable, creates a level 0 variable in its scope, this level 0 variable can be used by all underlying nested methods.
Level 1: this method uses global, level 0, and level 1 variable, which can be accessed by all underlying nested methods: level 2, level 3.
Level 2: similar to te previous ones, it also uses global, level 0, level 1 variables. And creates a level 2 variable that can be accessed by level 3 also.
Level 3:
This method uses all previously created variables, and creates a new level 3 variable.
Function calls:
As you can see, the function calls are part of the method scopes. So, in order to call level 3, we need to access level 2 (because it is getting called from level 2 scope), for level 2, we must call level 1, for which level 0 needs to be called.
So, level 0 is called, which gives its out put and calls level 1, which gives its own output and calls level 2 and so on till level 3 is also called.
CODE:
global_var = "global" #accessible to all functions
def level0():
level0_var = "level 0" #accessible to level 0,1,2,3
print();
print("Level 0 function:")
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
def level1():
print();
print("Level 1 function:")
level1_var = "level 1" ##accessible to level 1,2,3
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
print("local variable 1: ",level1_var)
def level2():
print();
print("Level 2 function:")
level2_var = "level 2" #accessible to level 2,3
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
print("local variable 1: ",level1_var)
print("local variable 2: ",level2_var)
def level3():
print();
print("Level 3 function:")
level3_var = "level 3" #accessible to level 3
print("global variable: ",global_var)
print("local variable 0: ",level0_var)
print("local variable 1: ",level1_var)
print("local variable 2: ",level2_var)
print("local variable 3: ",level3_var)
level3()
level2()
level1()
level0()
attached is the result of the code, also take note of the indentations too
cheers i hope this helps!!!!!
Answer:
Here is the corrected program:
import java.util.Scanner; //to accept input from user
public class 02_14_Activity_one { //class name
public static void main(String[] args) { //start of main method
Scanner scan = new Scanner(System.in); //creates Scanner class object
System.out.println("Enter first string"); //prompts user to enter first string
String s1 = scan.nextLine(); //reads input string from user
System.out.println("Enter second string"); //prompts user to enter second string
String s2 = scan.nextLine(); //reads second input string from user
System.out.println("Enter number of letters from each word"); //enter n
int n = scan.nextInt(); //reads value of integer n from user
System.out.println(s1.substring(0,n) + s2.substring(s2.length() - n ));
} } //uses substring method to print a string made up of the first n letters of s1 and the last n letters of s2.
Explanation:
The errors were:
1.
Scanner scan = Scanner(System.in);
Here new keyword is missing to create object scan of Scanner class.
Corrected statement:
Scanner scan = new Scanner(System.in);
2.
String s1 = nextLine();
Here object scan is missing to call nextLine() method of class Scanner
Corrected statement:
String s1 = scan.nextLine();
3.
String s2 = Scanner.nextLine();
Here class is used instead of its object scan to access the method nextLine
Corrected statement:
String s2 = scan.nextLine();
4.
String n = scan.nextLine();
Here n is of type String but n is a whole number so it should be of type int. Also the method nextInt will be used to scan and accept an integer value
Corrected statement:
int n = scan.nextInt();
5.
System.out.println(s1.substring(1,n-1) + s2.substring(s1.length()-n));
This statement is also not correct
Corrected statement:
System.out.println(s1.substring(0,n) + s2.substring(s2.length() - n ));
This works as follows:
s1.substring(0,n) uses substring method to return a new string that is a substring of this s1. The substring begins at the 0th index of s1 and extends to the character at index n.
s2.substring(s2.length() - n ) uses substring method to return a new string that is a substring of this s2. The substring then uses length() method to get the length of s2 and subtracts integer n from it and thus returns the last n characters of s2.
The screenshot of program along with its output is attached.
