8.7 Code Practice: Question 1 edhesive

Write a loop that reads positive integers from standard input and that terminates when it reads an integer that is not positive.

Paraphin [41]

Answer:

The program to this question as follows:

Program:

#defining variable and assign value

odd=0

even=0

i=1

print('Input 0 after inserting all number: ') #print message

while i>0: #define loop for check inserting and add all number

i=int(input()) #input value by user end

if (i< 0): #check value is not positive

break

if ((i % 2)==0and(i>0)): #check even number condition

even=even+i #add even numbers

if ((i % 2)!=0and(i>0)): #check odd number condition

odd=odd+i #add odd numbers

print ('Sum of Even number:',even,'and','Sum of Odd number:',odd) #print value

Output:

Input 0 after inserting all number:

1

2

3

5

7

0

Sum of Even number: 2 and Sum of Odd number: 16

Explanation:

In the above python program, three variable is defined, that is "even, odd and i", in which "even and odd" variable assign value that is "0", and the variable i is used for inserting elements from user. In the next line a while loop is defined that inserts numbers in variable "i", in this loop, 3 if block is used that can be defined as follows:

In first if block variable "i", checks that value is non-positive number if this condition is true, it will break the loop.
In second if block this block check even number condition and add in even variable.
In third, if block this block check odd number condition and add in odd variable.

End of the loop we use print function that prints the sum of even numbers and odd numbers.

3 0

3 years ago

Which type of loop is best if you do not know how many times you need the loop to run?

Alex

While: the loop must repeat until a certain "condition" is met. If the "condition" is FALSE at the beginning of the loop, the loop is never executed. The "condition" may be determined by the user at the keyboard. The "condition" may be a numeric or an alphanumeric entry. This is a good, solid looping process with applications to numerous situations.
while:int ctr = 1;
while (ctr < = 20)
{
cout<< ctr++ <<"\n";
}



HOPE i HELPED! brainliest? :D

5 0

3 years ago

Should I learn Python, C++, C# or VB to start off programming games for Windows. Open to other language recommendations as well!

Svetllana [295]

In theory, you can of course use any language you like, but there are a few commonly used ones.
From your list it would be c++ or c#, because if you actually have the interest long term then those will be the languages used by the various "big"/well known/used engines.
I would suggest c#, because it can be used with the Unity engine, which has an enormous community with help resources especially to start out and learn to program or game development.
On the other hand I would also suggest JavaScript. It isn't used for any of the big title development, but for all the *.io games like slither and so on. When looking at such games you will quickly notice that they are generally much simpler (for example 2D not 3D), because game engines are just simpler in JavaScript. While this is obviously limiting it might help to get something simple actually working, instead of getting stuck in extra complexities and additional features until you lose your motivation.
The basic programming you learn is still the same, so after you have learned a language you can quickly pick up most others.

7 0

3 years ago

Extend to also calculate and output the number of 1 gallon cans needed to paint the wal. Hint: Use a math function to round up t

Crank

Answer:

Here is the Python program:

import math #import math to use mathematical functions

height = float(input("Enter wall height (feet): ")) #prompts user to enter wall height and store it in float type variable height

width = float(input("Enter wall width (feet): ")) #prompts user to enter wall width and store it in float type variable width

area = height *width #computes wall area

print('Wall area: {} square feet'.format(round(area))) #displays wall area using round method that returns a floating-point number rounded

sqftPerGallon = 350 #sets sqftPerGallon to 350

paintNeeded = area/ sqftPerGallon #computes needed paint

print("Paint needed: {:.2f} gallons".format(paintNeeded)) #displays computed paint needed up to 2 decimal places

cansNeeded = int(math.ceil(paintNeeded)) #computes needed cans rounding the paintNeeded up to nearest integer using math.ceil

print("Cans needed: {} can(s)".format(cansNeeded)) #displays computed cans needed

colorCostDict = {'red': 35, 'blue': 25, 'green': 23} #creates a dictionary of colors with colors as key and cost as values

color = input("Choose a color to paint the wall: ") #prompts user to enter a color

if color in colorCostDict: #if the chosen color is present in the dictionary

colorCost = colorCostDict.get(color) #then get the color cost from dictionary and stores it into colorCost using get method that returns the value(cost) of the item with the specified key(color)

cost = cansNeeded * colorCost #computes the cost of purchasing paint of specified color per cansNeeded

print("Cost of purchasing {} paint: ${}".format(color,colorCostDict[color])) #displays the real cost of the chosen color paint

print("Cost of purchasing {} paint per {} gallon can(s): ${}".format(color,cansNeeded, cost)) #displays the cost of chosen color paint per cans needed.

Explanation:

The program first prompts the user to enter height and width. Lets say user enter 20 as height and 50 as width so the program becomes:

Wall area computed as:

area = height *width

area = 20 * 50

area = 1000

Hence the output of this part is:

Wall area: 1000 square feet Next program computes paint needed as:

paintNeeded = area/ sqftPerGallon

Since sqftPerGallon = 350 and area= 1000

paintNeeded = 1000 / 350

paintNeeded = 2.86

Hence the output of this part is:

Paint needed: 2.86 gallons

Next program computes cans needed as:

cansNeeded = int(math.ceil(paintNeeded))

This rounds the computed value of paintNeeded i.e. 2.86 up to nearest integer using math.ceil so,

cansNeeded = 3

Hence the output of this part is:

Cans needed: 3 can(s) Next program prompts user to choose a color to paint the wall

Lets say user chooses 'blue'

So the program get the cost corresponding to blue color and multiplies this cost to cans needed to compute the cost of purchasing blue paint per gallon cans. So

cost = cansNeeded * colorCost

cost = 3 * 25

cost = 75

So the output of this part is:

Cost of purchasing blue paint per 3 gallon can(s): $75 The screenshot of the program along with its output is attached.

5 0

3 years ago

Difference between switch case and if else statement.

ser-zykov [4K]

Answer:

<h3>SWITCH CASE:</h3>

☆ STATEMENT WILL BE EXECUTED IS DECIDED BY USER.

☆ SWITCH STATEMENT EVALUATES ONLY CHARACTER 《OR 》INTEGER VALUE.

☆ IT USING SINGLE EXPRESSION FOR MULTIPLE CHOICES.

<h3>IF - ELSE STATEMENT. </h3>

☆ STATEMENT WILL BE EXECUTED DEPEND UPON THE OUTPUT OF THE EXPRESSION INSIDE.

☆ IF THE STATEMENT EVALUATES INTEGER, CHARACTER, POINTER《 OR 》FLOATING- POINT TYPE 《 OR 》BOOLEAN TYPE.

☆ IF USING MULTIPLE STATEMENT FOR MULTIPLE CHOICES.

HOPE IT HELP....

7 0

3 years ago