Read the scenario and then answer the question using only the information provided.

Assume the variable myWord references a string. Write a statement that uses a slicing

givi [52]

Answer:

"myWord[-5:]"

Explanation:

So whenever you slice a string, the syntax in python is expressed as:

string[a:b:c]

where a=start index (this is included in the sliced string)

b = end index (this is excluded from the sliced string)

c = increment

If any of these are included, they are set to default values, where a=0, b=len(string), and c=1.

The increment isn't necessary here, and it's just so you know the syntax a bit more

Anyways, I'm assuming when the question asks to display "the last 5 characters in the string" it means in order? e.g "abcdefghijk" -> "ghijk" and not "abcdefghijk" -> "kjihg"

The last piece of information to know is what a negative index represents.

For example if I have the piece of code

"

string = "hello world"

print(string[-1])

"

This will output "d", and the negative 1 represents the last letter. If you did -2, it would output the 2nd to last letter and so on.

So to print the last 5 characters, we simply use the -5 as the starting index.

"

string = "hello world"

print(string[-5:])

"

This will print "world" or in other words, the last 5 letters. The reason for this is because the -5 in the first spot means the starting index is the 5th to last letter, and when you have the : after the -5, this is the way of telling python you're slicing the string, and not indexing 1 character. You don't need to include another value after that, because it will default to the last index of the string, or more specifically the last index + 1, since the last index is still included.

So the last thing to know, is that if the string isn't greater than 5 characters, it just prints the entire string, and no errors are raised. You can test this out your self as well. So whenever you have a string that's less than 5 characters the entire string is outputted.

3 0

1 year ago

In the context of an expert system, a _____ works with the knowledge base management system to ensure that the knowledge base is

defon

Answer:

Knowledge Acquisition Facility.

Explanation:

The power and effectiveness of the Expert System is equal to the quality of the knowledge it contains. The knowledge has to deal with high complexity and apply the best judgement. collection of expert knowledge is very important and involves the collecting information about a field usually from an expert. This information is stored in a computer program stored as a knowledge base.

Knowledge is always updating so it also very important to keep it up to date and it is done by Knowledge Acquisition Facility.

3 0

3 years ago

Task 1 – File Input

e-lub [12.9K]

Answer:

Check the explanation

Explanation:

using System;

using System.IO;

public class Program

{

public static void Main()

{

string[] lines;

Console.WriteLine("enter name of the file");

String fileName=Console.ReadLine();

Console.WriteLine("enter path of the file");

String filePath=Console.ReadLine();

using (StreamReader streamReader = File.OpenText(filePath))

{

String text = streamReader.ReadToEnd();

lines = File.ReadAllLines(filePath);

}

Console.WriteLine("Enter path of the file to write");

String outputFilePath = Console.ReadLine();

bool fileExist = File.Exists(outputFilePath);

if (fileExist)

{

overWriteOrChangeFileName(outputFilePath);

}

else

{

File.Create(outputFilePath);

File.WriteAllLines(outputFilePath, lines);

}

Console.Write("Input file Path"+filePath);

Console.Write("output file path"+outputFilePath);

void overWriteOrChangeFileName(String filePathtoCheck){

Console.WriteLine("File exists. Do you want to overwrite the file or do you want to change the location and file name of the new file.Press Y to overwrite and press C to change the location and filename");

String userInput=Console.ReadLine();

if(userInput.Equals("Y")){

File.WriteAllLines(outputFilePath, lines);

}else{

Console.WriteLine("enter new path of the file including filename");

String NewFileName=Console.ReadLine();

outputFilePath=NewFileName;

if(File.Exists(outputFilePath)){

overWriteOrChangeFileName(outputFilePath);

}

else

{