Python Program to Print Series 1 2 5 8 15 28 51 94....N

In the previous article, we have discussed Python Program to Print Series 0, 6, 10, 17, 22, 30, 36…N
Given a number N and the task is to print the series (1 2 5 8 15 28 51 94….N) till the given number N in Python.

Examples:

Example1:

Input:

Given Number (Limit) = 13

Output:

The above series till the given number{ 13 } is :
1 2 5 8 15 28 51 94 173 318 585 1076 1979

Example2:

Input:

Given Number (Limit) = 8

Output:

The above series till the given number{ 8 } is :
1 2 5 8 15 28 51 94

Program to Print Series 1 2 5 8 15 28 51 94….N in Python

Below are the ways to print the series (1 2 5 8 15 28 51 94….N) till the given number N in Python:

Using While Loop (Static Input)
Using While loop (User Input)

Method #1: Using While Loop (Static Input)

Approach:

Give the number N (Limit) as static input and store it in a variable.
Take a variable to say itr and initialize its value to 4.
Check if the given number is greater than or equal to 1 using the if conditional statement.
If it is true, then print 1 separated by spaces using the end function.
Check if the given number is greater than or equal to 2 using the if conditional statement.
If it is true, then print 2 separated by spaces using the end function.
Check if the given number is greater than or equal to 3 using the if conditional statement.
If it is true, then print 5 separated by spaces using the end function.
Take another variable say m and initialize its value to 1.
Take another variable say n and initialize its value to 2.
Take another variable say o and initialize its value to 5.
Loop until the above-declared variable itr value is less than or equal to the given number using the while loop.
Inside the loop, add the above 3 values m, n, o and store them in a variable say rslt.
Assign the value of n to m.
Assign the value of o to n.
Assign the value of rslt to o.
Print the value of the rslt separated by spaces using the end function.
Increment the above itr value by 1.
The Exit of the Program.

Below is the implementation:

# Give the number N(limit) as static input and store it in a variable.
gvn_numb = 13
# Take a variable to say itr and initialize its value to 4.
itr = 4
print("The above series till the given number{", gvn_numb, "} is :")
# Check if the given number is greater than or equal to 1 using the if conditional
# statement.
if gvn_numb >= 1:
    # If it is true, then print 1 separated by spaces using the end function.
    print("1 ", end="")
# Check if the given number is greater than or equal to 2 using the if conditional
# statement.
if gvn_numb >= 2:
    # If it is true, then print 2 separated by spaces using the end function.
    print("2 ", end="")
# Check if the given number is greater than or equal to 3 using the if conditional
# statement.
if gvn_numb >= 3:
  # If it is true, then print 5 separated by spaces using the end function.
    print("5 ", end="")
# Take another variable say m and initialize its value to 1.
m = 1
# Take another variable say n and initialize its value to 2.
n = 2
# Take another variable say o and initialize its value to 5.
o = 5
# Loop until the above-declared variable itr value is less than or equal to the
# given number using the while loop.
while itr <= gvn_numb:
    # Inside the loop, add the above 3 values m, n, o and store them in a variable
    # say rslt.
    rslt = m + n + o
   # Assign the value of n to m.
    m = n
    # Assign the value of o to n.
    n = o
    # Assign the value of rslt to o.
    o = rslt
    # Print the value of the rslt separated by spaces using the end function.
    print(rslt, end=" ")
    # Increment the above itr value by 1.
    itr += 1

Output:

The above series till the given number{ 13 } is :
1 2 5 8 15 28 51 94 173 318 585 1076 1979

Method #2: Using While loop (User Input)

Approach:

Give the number N (Limit) as user input using the int(input()) function and store it in a variable.
Take a variable to say itr and initialize its value to 4.
Check if the given number is greater than or equal to 1 using the if conditional statement.
If it is true, then print 1 separated by spaces using the end function.
Check if the given number is greater than or equal to 2 using the if conditional statement.
If it is true, then print 2 separated by spaces using the end function.
Check if the given number is greater than or equal to 3 using the if conditional statement.
If it is true, then print 5 separated by spaces using the end function.
Take another variable say m and initialize its value to 1.
Take another variable say n and initialize its value to 2.
Take another variable say o and initialize its value to 5.
Loop until the above-declared variable itr value is less than or equal to the given number using the while loop.
Inside the loop, add the above 3 values m, n, o and store them in a variable say rslt.
Assign the value of n to m.
Assign the value of o to n.
Assign the value of rslt to o.
Print the value of the rslt separated by spaces using the end function.
Increment the above itr value by 1.
The Exit of the Program.

Below is the implementation:

# Give the number N (Limit) as user input using the int(input()) function and 
# store it in a variable.
gvn_numb = int(input("Enter some Random Number = "))
# Take a variable to say itr and initialize its value to 4.
itr = 4
print("The above series till the given number{", gvn_numb, "} is :")
# Check if the given number is greater than or equal to 1 using the if conditional
# statement.
if gvn_numb >= 1:
    # If it is true, then print 1 separated by spaces using the end function.
    print("1 ", end="")
# Check if the given number is greater than or equal to 2 using the if conditional
# statement.
if gvn_numb >= 2:
    # If it is true, then print 2 separated by spaces using the end function.
    print("2 ", end="")
# Check if the given number is greater than or equal to 3 using the if conditional
# statement.
if gvn_numb >= 3:
  # If it is true, then print 5 separated by spaces using the end function.
    print("5 ", end="")
# Take another variable say m and initialize its value to 1.
m = 1
# Take another variable say n and initialize its value to 2.
n = 2
# Take another variable say o and initialize its value to 5.
o = 5
# Loop until the above-declared variable itr value is less than or equal to the
# given number using the while loop.
while itr <= gvn_numb:
    # Inside the loop, add the above 3 values m, n, o and store them in a variable
    # say rslt.
    rslt = m + n + o
   # Assign the value of n to m.
    m = n
    # Assign the value of o to n.
    n = o
    # Assign the value of rslt to o.
    o = rslt
    # Print the value of the rslt separated by spaces using the end function.
    print(rslt, end=" ")
    # Increment the above itr value by 1.
    itr += 1

Output:

Enter some Random Number = 8
The above series till the given number{ 8 } is :
1 2 5 8 15 28 51 94

If you wanna write simple python programs as a part of your coding practice refer to numerous Simple Python Program Examples existing and learn the approach used.