Q:

Write a python program to accept a number from a user and calculate the sum of all numbers from 1 to a given number

belongs to collection: Python Loop Exercises

YasminRadwan26
Save to bookmark
|
2022-05-03
|
  801 
0

Calculate the sum of all numbers from 1 to a given number

Write a program to accept a number from a user and calculate the sum of all numbers from 1 to a given number

For example, if the user entered 10 the output should be 55 (1+2+3+4+5+6+7+8+9+10)

Expected Output:

Enter number 10
Sum is:  55
Python programming,
login and add your own answer to this question

All Answers

YasminRadwan26
2022-05-03
need an explanation for this answer? contact us directly to get an explanation for this answer

Hint:

Approach 1: Use for loop and range() function

  • Create variable s = 0 to store the sum of all numbers
  • Use Python 3’s built-in function input() to take input from a user
  • Convert user input to the integer type using the int() constructor and save it to variable n
  • Run loop n times using for loop and range() function
  • In each iteration of a loop, add current number (i) to variable s
  • Use the print() function to display the variable s on screen

Approach 2: Use the built-in function sum(). The sum() function calculates the addition of numbers in the list or range

Solution1:Using for loop and range() function

# s: store sum of all numbers
s = 0
n = int(input("Enter number "))
# run loop n times
# stop: n+1 (because range never include stop number in result)
for i in range(1, n + 1, 1):
    # add current number to sum variable
    s += i
print("\n")
print("Sum is: ", s)

Solution2:Using the built-in function sum()

n = int(input("Enter number "))
# pass range of numbers to sum() function
x = sum(range(1, n + 1))
print('Sum is:', x)

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

Python Loop Exercises
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
Display numbers from a list using loop using pytho... >>
<< Write a python program to print the following numb...