what is the purpose of using end = ' ' in a print statement?

Question

def fib(n):
a,b=0,1
while a<n:
print(a, end = ' ')
a, b = b, a+b
print()

>>> fib(100)
0 1 1 2 3 5 8 13 21 34 55 89

Answer 1

Using your code for this particular purpose is ok. But if wanted to add a ',' between each numbers the similar to your code is:

def fib(n):
a,b=0,1
while a<n:
print(a, end = ',')
a, b = b, a+b
print()

>>> fib(100)
0,1,1,2,3,5,8,13,21,34,55,89,

The last comma doesn't look so good. So there is a better approach:

def fib(n):
a,b=0,1
nums=[]
while a<n:
nums.append(a)
a, b = b, a+b
print(','.join(nums))

>>> fib(100)
0,1,1,2,3,5,8,13,21,34,55,89

So try to learn to use string methods to be more creative. 😊😉😊

Answer 2

print() ends all printed text with a newline (\n) by default. "end" is an optional argument that makes print() end the text with something else.
Empty quotes means nothing else will be printed (your next text will print on the same line). ' ' will print a space (which is what your code is doing).

Answer 3

thanks all...