Nested Loop in Python

Nested loop means number of any loop within a another loop. In nested loop the inner loop execute n number of times depends on each iteration of outer loop.

The syntax of nested loop given below:

for variable in sequence:
       block of statement
       for variable in sequence:
                block of statement
other statement

Example 1:

Program to display the following pattern: 
1 

1 2 

1 2 3 

1 2 3 4 

1 2 3 4 5 

Ans: 
for i in range(1,6):
    for j in range(1,i+1):
        print(j,end=" ")
    print("\n")


Example 2:

Program to display the pattern:
@ @ @ @ @ 
@ @ @ @ 
@ @ @ 
@ @ 
@ 

Ans:
n=int(input("Enter row"))
for row in range(n,0,-1):
    for col in range(1,row+1):
        print("@",end=" ")
    print()