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3 years ago

What is stored in str after the following code executes?

Computers and Technology

1 answer:

uranmaximum [27]3 years ago

6 0

Answer:

"CoCoComputer Science"

Explanation:

First let's understand how the loop works, then we'll see what it does.

The variable i is initialized to value 0. Then inside the loop, it's incremented by 2 in each loop passage, while i < 8, so the loop will be processed with the following values of i: 0, 2, 4 and 6. It will run a total of 4 times.

Let's examine the actions done during the FIRST loop:

(str equals "Computer Science", so indexOf('m') = 2, i = 0)

- if the index of 'm' within the string is < i (index = 2, i = 0, FALSE)

does nothing

increases value of i by 2 (now i = 2)

Let's examine the actions done during the SECOND loop:

(str equals "Computer Science", so indexOf('m') = 2, i = 2)

- if the index of 'm' within the string is < i (index = 2, i = 2, FALSE)

does nothing

increases value of i by 2 (now i = 4)

Let's examine the actions done during the THIRD loop:

(str equals "Computer Science", so indexOf('m') = 2, i = 4)

- if the index of 'm' within the string is < i ( index = 2, i = 4, TRUE)

then str becomes "CoComputer Science"

increases value of i by 2 (now i = 6)

Let's examine the actions done during the FOURTH loop:

(str equals "CoComputer Science", so indexOf('m') = 4, i = 6)

- if the index of 'm' within the string is < i (index = 4, i = 6, TRUE)

then str becomes "CoCoComputer Science"

increases value of i by 2 (now i=8)

Loop ends because i = 8 (i < 8 becomes false)

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Answer:

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//initialize

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//if-else statement for checking the conditions

if(a == b && b == c && a == c){

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}else if(a != b && b != c && a != c ){

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}else{

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}

return 0;

}

Explanation:

Create the main function and declare the three variables for the length of the sides of the triangle.

print the message on the screen for the user. Then the user enters the values and its store in the variables a, b, and c.

use the if-else statement for checking the conditions.

Equilateral triangle: all sides of the triangle are equal.

if condition true, print the equilateral triangle.

Scalene triangle: all sides of the triangle are not equal.

if condition true, print the Scalene triangle.

if both conditions is not true, then, the program moves to else part and print isosceles.

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Answer:

Here is the JAVA program:

import java.util.Scanner; //to import Scanner class

public class ISBN

{ public static void main(String[] args) { // start of main() function body

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Explanation:

This program takes a 10-digit integer as a command line argument and uses Scanner class to accept input from the user.

The for loop has a variable i that starts from 2 and the loop terminates when the value of i exceeds 10 and this loop multiplies each digit of the input number with the i and this product is added and stored in variable sum. charAt() function is used to return a char value at i-1.

This is done in the following way: suppose d represents each digit:

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If the value of remainder is not equal to 10, then it prints a valid 11-digit number with the given integer as its first 10 digits and the checksum computed by sum % 11 as the last digit.

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