Day 55: Python Program to Read a Number n and Print the Series “1+2+… +n= “

 n = int(input("Enter a number: "))

series = " + ".join(str(i) for i in range(1, n + 1))

total_sum = sum(range(1, n + 1))

print(f"{series} = {total_sum}")

#source code --> clcoding.com 

Code Explanation:

Input

n = int(input("Enter a number: "))

Prompts the user to enter an integer.

Converts the input to an integer using int() and stores it in the variable n.

Generate the Series

series = " + ".join(str(i) for i in range(1, n + 1))

Generates a string representation of the series 

1+2+3+…+n:

range(1, n + 1): Creates a range of integers from 1 to 𝑛

n (inclusive).

str(i) for i in range(1, n + 1): 

Converts each number in the range to a string.

" + ".join(...): Joins these strings with " + " as the separator, forming the series.

For example:

If 

n=5, the result is: "1 + 2 + 3 + 4 + 5".

Calculate the Total Sum

total_sum = sum(range(1, n + 1))

Computes the sum of all integers from 1 to n:

range(1, n + 1): Creates a range of integers from 1 to 𝑛

n (inclusive).

sum(...):

 Adds all the numbers in the range.

For example:

If 𝑛=5, the result is: 1+2+3+4+5=15

Output the Result

print(f"{series} = {total_sum}")

Uses an f-string to format the output.

Prints the series and the total sum in the format:

series=total_sum

For example:

If 𝑛=5, the output is:

1 + 2 + 3 + 4 + 5 = 15