Question

Write a code using loop and flag function in python jupitior notebook:

	Ask the user for the number of items they bought. Also ask the price of each item they bought and quantity purchased. Display the total amount they owe.
	Ask the user for a number n. Calculate 1+2+3+….+n.
	Ask the user for a number n. Calculate 1*2*3*…*n.
	Ask the user for number of rows (r) and columns (c). Print * for r rows and c columns.
	Ask the user for the number of rows (r). Print * for r rows with each row having as many *s as the row’s number. For example, if the user enters 5, your output should look like: * ** *** **** *****
	Modify the code you wrote for the problem above to get the following: Enter number of rows: 5 * ** *** **** ***** **** *** ** *
	Write a for loop that displays the following set of numbers: 0, 10, 20, 30, 40, 50 . . . 1000
	Ask the user to enter 10 numbers and keep/display a running total of the numbers entered.
	Running on a particular treadmill you burn 4.2 calories per minute. Write a program that uses a loop to display the number of calories burned after 10, 15, 20, 25, and 30 minutes.
	Collatz Sequence: Let’s look at a simple sequence that has fascinated and foxed mathematicians for many years. The “computational rule” for creating the sequence is to start from some given n, and to generate the next term of the sequence from n, either by halving n, (whenever n is even), or else by multiplying it by three and adding 1 (that is, 3n+1). The sequence terminates when n reaches 1.

Answer 1

Note : According to HomeworkLib policy answered only first 4 questions

Program 1 :

n=int(input("Enter number of items: "))
tsum=0
for i in range(n):
print("Enter item ",i+1,"amount");
iamount=int(input())
tsum=tsum+iamount;
print("Total amount for ",n," item is ",tsum )

screen shot of the program :

main.py 1 n=int(input("Enter number of items: ")), 2 tsum=0 3- for i in range(n): 4 print("Enter item ",i+1, "amount"); 5 iamount=int(input() tsum=tsum+iamount; 7 print("Total amount for ",n," item is ", tsum) Enter number of items: 3 Enter item 1 amount 45 Enter item 2 amount 35 Enter item 3 amount 23 Total amount for 3 item is 103 ... Program finished with exit code o Press ENTER to exit console.

Program 2:

n=int(input("Enter a number : "))
s=0
for i in range(n):
s=s+i+1;
print("sum of the first ",n,"natural numbers is:",s)

screen shot of the program :

main.py 1 n=int(input("Enter a number : ")) 2 s=0 3 for i in range(n): 4 s=s+i+1; 5 print("sum of the first", n, "natural numbers is:",s) Enter a number : 5 sum of the first 5 natural numbers is: 15 ... Program finished with exit code o Press ENTER to exit console.]

Program 3:

n=int(input("Enter a number : "))
s=1
for i in range(n):
s=s*(i+1);
print("Multiplication of the first ",n,"natural numbers is:",s)

Screen shot of the program :

RUN Devy s p Side Save u Dedully main.py 1 n=int(input("Enter a number : ")) 2 s=1 3- for i in range(n): s=s*(i+1); 5 print("Multiplication of the first ",n, "natural numbers is:",s), input Enter a number : 5 Multiplication of the first 5 natural numbers is: 120 ... Program finished with exit code o Press ENTER to exit console. I

Program 4:

r=int(input("Enter number of rows: "))
c=int(input("Enter number of columns: "))
for i in range(r):
for j in range(c):
print("*",end=" ")
print()

Screen shot of the program :

Run Debug Stop Share Save main.py 1 ruint(input("Enter number of rows: ")) 2 Cuint(input("Enter number of columns: ")), 3- for i in range(r): 4 for j in range(c): 5 print("*", end=" ") 6 print Enter number of rows: 3 Enter number of columns: 5 ... Program finished with exit code o Press ENTER to exit console.