Write a Python program to find the sum of all numbers between 1 and a given number:-

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n=int(input('Enter the number : '))
sum=0
for i in range(1,n+1):
    sum=sum+i 
print(sum)

Output :

Enter the number : 10
55

Here's a line-by-line explanation of what the code does:

1. n=int(input('Enter the number: ')): This line prompts the user to enter a number and stores it in the variable n. The int() function is used to convert the user input, which is a string, to an integer.

2. sum=0: This line initializes the variable sum to 0. This variable will be used to store the sum of all integers from 1 to n.

3. for i in range(1,n+1):: This line starts a for loop that iterates over all integers from 1 up to and including n. The range() function generates a sequence of integers from 1 to n, and the loop variable i take on each value in this sequence in turn.

4. sum=sum+i: This line adds the current value of i to the running total stored in the variable sum.

5. print(sum): This line prints the final value of sum, which is the sum of all integers from 1 to n.

Overall, this code calculates the sum of all integers from 1 to n using a simple loop and variable manipulation.

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If you are a beginner and want to know more about python programming, you can read my basics of python blogs (From part 1 to part 15).

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Happy Learning !!!