All categories

2 years ago

CodeHS Python Rainforest Exercise 5.4.7: Categories

Computers and Technology

1 answer:

nalin [4]2 years ago

7 0

Answer:

List=[['Computers','IT','Programming'],['Maths', 'Algebra', 'Geometry']]

i=0

k=0

for i in range(0,2):

print("Category:"+List[i][0])

for k in range(1,3):

print("\t"+List[i][k])

Explanation:

The required program is as above. We have used here a multidimensional list. The 0 of each row has the category,and rest are sub categories. The program above has limitations but is good enough to explain the fundamentals required.

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a.Write a Python function sum_1k(M) that returns the sumí‘ í‘ = âˆ‘1í‘˜í‘˜í‘€í‘€í‘˜í‘˜=1b.Compute s for M = 3 by hand and write

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Answer:

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s = 0

for k in range(1, M+1):

s = s + 1.0/k

return s

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computed_value = sum_1k(3)

if expected_value == computed_value:

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1 year ago

Write a method that accepts a String object as an argument and displays its contents backward. For instance, if the string argum

Nata [24]

Answer:

// importing the necessary libraries

import java.util.Scanner;

public class BackwardString {

public static void main(String[] args) {

String input;

// Scanner object to read string from user input

Scanner scanner = new Scanner(System.in);

System.out.print("Enter String here : ");

input=scanner.next();

// calling backward method to reverse passed string

backward(input);

// closing Scanner object

scanner.close();

}

// Method to Reverse the input string

private static void backward(String source) {

int i, len = source.length();

StringBuilder dest = new StringBuilder(len);

for (i = (len - 1); i >= 0; i--){

dest.append(source.charAt(i));

}

System.out.println("Reversed String : "+dest);

}

Explanation:

// importing the necessary libraries

import java.util.Scanner;

public class BackwardString {

public static void main(String[] args) {

String input;

// Scanner object to read string from user input

Scanner scanner = new Scanner(System.in);

System.out.print("Enter String here : ");

input=scanner.next();

// calling backward method to reverse passed string

backward(input);

// closing Scanner object

scanner.close();

}

// Method to Reverse the input string

private static void backward(String source) {

int i, len = source.length();

StringBuilder dest = new StringBuilder(len);

for (i = (len - 1); i >= 0; i--){

dest.append(source.charAt(i));

}

System.out.println("Reversed String : "+dest);

}

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2 years ago