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Program 10: To add first five natural numbers

Program10.py

File Edit Format Run Options Window Help

#Program to add first five natural numbers

sum = 0
a = 1
while (a <= 5):
sum += a
a += 1
print('The sum of first five natural number is', sum)

You will get the following output:

Output

The sum of first five natural number is 15

Program 11: To print the pattern of stars in decreasing order in the form of triangle.

Program11.py
File Edit Format Run Options Window Help

#Program to create star pattern

for i in range(10, 0, -1):
print("*"*i)

Output

**********
*********
********
*******
******
*****
****
***
**
*

NASA’s reusable space shuttle in the 1970s had less code than our phones today.

#Loops in Python 119