Python program to print 20 terms of Fibonacci series.

Lang : Python

'''
0
1  
1  
2  
5
8
13
21
34
55
89
144
233
377
610
987
1597
2584
4181
'''
# Solution
first = 0
second = 1

print('0')
print('1')

for i in range(1, 19):  
    third = first + second
    print(third)
    first, second = second, third 

Let's break down the code step by step:

1. first = 0 and second = 1: These are variables that store the first two numbers of the Fibonacci series.

2. print('0') and print('1'): These lines simply print the first two numbers of the series.

3. for i in range(1, 19): This loop is used to calculate and print the next 18 terms of the Fibonacci series. The loop starts from 1 and goes up to 18.

4. Inside the loop:

• third = first + second: third is the sum of the last two numbers (first and second).
• print(third): Prints the current Fibonacci number.
• first, second = second, third`: Updates the values of first and second for the next iteration. It's a way of shifting to the next two numbers in the series.

So, the loop continues, adding the last two numbers to get the next one, printing it, and updating the values to move on to the next calculation. This process repeats until you have printed a total of 20 terms (including the initial '0' and '1').