a=" "*j+"*"*i+" "*j please tell this logic

Question

i=1
j=2
while i>=1:
a=" "*j+"*"*i+" "*j
print(a)
i=i+2
j=j-1
if i>5:
break
i=3
j=1
while i>=1:
a=" "*j+"*"*i+" "*j
print(a)
i=i-2
j=j+1

OUTPUT
*
***
*****
***
*

Answer 1

a=" "*j+"*"*i+" "*j
" " * j is a multiplication of spaces " " by j ,
if j == 2 it will print 2 spaces.
"*"*i multiplication of "*" by i.
if i == 1 it will print one "*".
+ is used to concatenate left spaces " " with "*" and right spaces " "
first loop decreases the number of spaces and increases the number of "*"
second loop does the opposite.

replace a=" "*j+"*"*i+" "*j
with
a="x"*j+"*"*i+"x"*j
see what happens to x.