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3 years ago

Find and fix the error in the if-else statement. import java.util.Scanner;

Computers and Technology

2 answers:

salantis [7]3 years ago

3 0

Answer:

Hi there Rumanruxi! The error is in the if statement "if(userNum = 2)".

Explanation:

The if statement in this Java code is assigning userNum the value of 2 instead of comparing it with the value of 2. For equals comparison we need to write two equals "==" in the statement as: "if (userNum == 2)". This will return true if userNum is 2 otherwise it will return false.

andriy [413]3 years ago

3 0

Answer:

The error generated when the code is compiled:

incompatible types: int cannot be converted to boolean

Explanation:

This error is generated because the variable userNum is being assigned the value of 2.

userNum= 2

here = is the assignment operator used to assign the value 2 to the variable userNum

But here we need to compare the values with the value 2. So in order to compare the values in IF statement, == is used which is called the equality operator, instead of =

So the corrected if statement is:

if(userNum==2)

So the program prompts the user to enter a value (0,1,2,3) which is read in the userNum. Next the if statement checks if that input value is equal to 2. Num is equal to two message is displayed in the output when the if condition evaluates to true and Else part is executed if the condition evaluates to false and Num is not two message is displayed in the output.

For example the user enters a value 1 then the following message will be displayed in the output:

Num is not two

If the user enters 2 then the following message will be displayed in the output:

Num is equal to two

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Norma-Jean [14]

Answer:

Explanation:

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Step 2: After examining the current state of the hard drive I will explain the actual problem to the client in a very lucid and eloquent manner whether it is feasible to retrieve the lost data or it is beyond repair.

Step 3: Identify a solution to the problem with things at my disposal(finding a right tool).

Step 4: apply the solution found to retrieve the data from the hard drive.

Step 5: submitting the retrieved data from the corrupt drive to the customer and advocating them the preventive measures for future reference.

The above five steps will work perfectly to resolve the issue faced if followed with great care and being heedful of the situation at hand.

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3 years ago

Which of the following techniques can you not use to make the members of the std namespace available to your code? a. Code a usi

Aleksandr-060686 [28]

Answer:

b. Code an include preprocessor directives for the members

Explanation:

Namespace in programming can be defined as the declarative region which provides scope for the identifiers such as the functions, name of the types, variables, etc.

The namespaces are $\text{used to organize}$ the code into the logical groups and also used to prevent the name collision.

The ways that can be used outside the namespace $\text{can access the members}$ as :

-- the code used the fully qualifies name

-- by using the declaration to bring one of the identifier into the scope

-- by using the directive to bring all the things in the newspaper into the scope.

Thus the correct option is (b).

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3 years ago

Provide your own examples of the following using Python lists. Create your own examples. Do not copy them from another source. N

leonid [27]

Lists are used in Python to hold multiple values in one variable

(a) Nested list

A nested list is simply a list of list; i.e. a list that contains another list.

It is also called a 2 dimensional list.

An example is:

nested_list = [[ 1, 2, 3, 4] , [ 5, 6, 7]]

(b) The “*” operator

The "*" operator is used to calculate the product of numerical values.

An example is:

num1 = num2 * num3

List slices

This is used to get some parts of a list; it is done using the ":" sign

Take for instance, you want to get the elements from the 3rd to the 5th index of a list

An example is:

firstList = [1, 2 ,3, 4, 5, 6, 7]

secondList = firstList[2:5]

The “+=” operator

This is used to add and assign values to variables

An example is:

num1 = 5

num2 = 3

num2 += num1

A list filter

This is used to return some elements of a list based on certain condition called filter.

An example that prints the even elements of a list is:

firstList = [1, 2 ,3, 4, 5, 6, 7]

print(list(filter(lambda x: x % 2 == 0, firstList)))

A valid but wrong list operation

The following operation is to return a single list, but instead it returns as many lists as possible

def oneList(x, myList=[]):

myList.append(x)

print(myList)

oneList(3)

oneList(4)

Read more about Python lists at:

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2 years ago

Which C99 function can be used to convert a string to a double?

nordsb [41]

Answer:

atof

Explanation:

atof function is used to convert a string to a double.

It takes a single parameter of type const char * and returns a double value.

The function signature is: double atof (const char* str);

In order to use this function in the code, you need to include the header file <stdlib.h>

For example:

#include <stdio.h>

#include <stdlib.h>

int main()

{

char str[5] = "0.01";

double d = atof(str);

printf("Value = %f\n", d);

return 0;

}

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3 years ago

Which of the following is opened when the Find command is clicked? Question 9 options: Navigation Pane Insert Hyperlink dialog b

Dima020 [189]

The element, from the following options, which is opened when the find command is clicked is the search pane.

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Find command is the command which is used to find the list of files and their location.

Find command can be used in different manners-

To find the different files in a system.
Find command can find the files by their name, size, date or other information related to the required document.
This command can be modified with the requirement of the search.

The options for the given problem are-

Navigation Pane Insert- It is used to show the navigation pane in word or similar space.
Hyperlink dialog box-This open, when the insert hyperlink command is clicked.
Bookmark dialog box-This opens, when the bookmark command is clicked.
Search Pane- Search pane is opens, when the find commond is clicked.

Thus, the element, from the following options, which is opened when the find command is clicked is the search pane.

Learn more about the find command here:

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2 years ago