Answers for "python how to use range"

making your own range function in python

def range_by(starting_number, ending_number):
    #sequence = [starting_number]
    sequence = []
    while starting_number < ending_number:
        sequence.append(starting_number)
        starting_number += 1
        
    return sequence

print(range_by(-3,6))

python range

# range(start, stop, step)
  # start = (can be ommitted) index to begin at (INCLUSIVE)
  # stop = generate numbers up to, but not including this number (EXCLUSIVE)
  # step = (can be omitted) difference between each number in the sequence

# idx:  0	1	2	3 	4
# arr:  19	5	3	22	13
  
arr = [19,5,3,22,13]

# range(stop)
for i in range(len(arr)):
    print(arr[i]) # prints: 19, 5, 3, 22, 13

# range(start, stop)
for i in range(2, len(arr)):
    print(arr[i]) # prints: 3, 22, 13
    
# range(start, stop, step)
for i in range(0, len(arr), 2):
    print(arr[i]) # prints: 19, 3, 13
    
# reverse:
for i in range(len(arr)-1, -1, -1):
    print(arr[i])

range in python

#range(start,stop,step)
for x in range(0,20,2):
  print(x)

python range

for i in range(0, 4):
	print(i)

>0
>1
>2
>3



for i in range(4):
	print(i)
  
>0
>1
>2
>3



for i in range(0, 4, 2):
	print(i)
    
>0
>2