Python Day-16 Loop-Slicing & step operator,Pattern Formation,Task

Slicing operator & Step operator:

Example:

name = 'abcdefghijklmn'

name[2:8] --> Slicing Operator-->Used for extracting portions of a sequence.

name[2:8:3] --> Step Operator-->The step operator defines the interval between indices. A positive step moves forward, while a negative step moves backward.

1) Syntax to get following output:

1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
Method:1(Using 2 variables)

start, end = 1, 6
while end>1:
    for num in range(start,end):
        print(num, end=' ')
    print()
    end-=1

Method:2(Using single variable)

end = 6
while end>1:
    for num in range(1,end):
        print(num, end=' ')
    print()
    end-=1

Method:3(Without using variables)

for end in range(6,1,-1):
    for num in range(1,end):   
        print(num, end=' ')
    print()

Method:4

for row in range(5):
    for col in range(5-row):
        print(col+1, end=' ')
    print()

Output:

1 2 3 4 5 
1 2 3 4 
1 2 3 
1 2 
1 

2) Syntax to get following output:

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

for row in range(2,7):
    for col in range(1,row):
        print(col,end=' ')
    print()

Output:

1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5 

3) Syntax to get following output:
2 4 6 8 10
2 4 6 8
2 4 6
2 4
2

for row in range(5):
    for col in range(5-row):
        print((col+1)*2, end=' ')
    print()

Output:

2 4 6 8 10 
2 4 6 8 
2 4 6 
2 4 
2 

4) Syntax to get following output:

1 2 3 4 5
2 4 6 8
3 6 9
4 8
5

for row in range(5):
    for col in range(5-row):
        print((col+1)*(row+1), end=' ') 
    print()

Output:

1 2 3 4 5 
2 4 6 8 
3 6 9 
4 8 
5 

Task:
Draw this "kolam" without taking your hand out from paper: