import sys
! hostname
! whoami
print(sys.executable)
print(sys.version)
print(sys.version_info)

atomickitty.aws
compthink
/opt/conda/envs/python/bin/python
3.8.3 (default, Jul  2 2020, 16:21:59) 
[GCC 7.3.0]
sys.version_info(major=3, minor=8, micro=3, releaselevel='final', serial=0)

Demonstrate for loop

# sum numbers from 1 to n
howmany = int(input('Enter N'))
accumulator = 0.0
for i in range(1,howmany+1,1):
    accumulator = accumulator + float(i)
print( 'Sum from 1 to ',howmany, 'is %.3f' % accumulator  )

Sum from 1 to  5 is 15.000

# sum even numbers from 1 to n
howmany = int(input('Enter N'))
accumulator = 0.0
for i in range(1,howmany+1,1):
    if i%2 == 0:
        accumulator = accumulator + float(i)
print( 'Sum of Evens from 1 to ',howmany, 'is %.3f' % accumulator  )

Sum of Evens from 1 to  5 is 6.000

howmany = int(input('Enter N'))
linetoprint=''
for i in range(1,howmany+1,1):
    linetoprint=linetoprint + '*'
    print(linetoprint)

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Demonstrate while loop

# sum numbers from 1 to n
howmany = int(input('Enter N'))
accumulator = 0.0
counter = 1
while counter <= howmany:
    accumulator = accumulator + float(counter)
    counter += 1
print( 'Sum from 1 to ',howmany, 'is %.3f' % accumulator  )

Sum from 1 to  6 is 21.000

# sum even numbers from 1 to n
howmany = int(input('Enter N'))
accumulator = 0.0
counter = 1
while counter <= howmany:
    if counter%2 == 0:
        accumulator = accumulator + float(counter)
    counter += 1
print( 'Sum of Evens 1 to ',howmany, 'is %.3f' % accumulator  )

Sum of Evens 1 to  6 is 12.000

howmany = int(input('Enter N'))
linetoprint=''
counter = 1
while counter <= howmany:
    linetoprint=linetoprint + '*'
    counter += 1
    print(linetoprint)

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