What are Loops?

 Loops are the programming structure that repeats a set of   instruction till a particular condition is met.

Loop play a vital role in programming and there are numerous of programs which are completely based on loops like Sum, Factorial, Palindrome, Armstrong Number and many more. There are many logics which are baseless without loops.

It shows that when the program reaches the loop statements then the loop syntax will not allow the program to execute further till the Requirements are met or satisfied.

How it is different from Conditional Statements ?

In conditional statements either the condition is true or false the program will proceed further or it will print or  execute some statements.

But in Loops till the condition is not fulfilled the program will not proceed further it will be in a continuous cycle inside the syntax.

There are different types of Loops in Programming Language :

- for Loop 

- while Loop

- do-while Loop

- Nested Loops

for Loop:

For loop is a loop which will repeat a block of code till n number of times where n is the range of the loop which can be either pre-decided or during run time. It requires a iterator which is used to initialize the loop.

Syntax:-

for iterator in sequence:
	# loop body	
    
# OR

for iterator in range(range_variable or constant):
	# loop body
    

# Program to print a character 5 times
c = str(input("Enter a Character:"))

for i in range(5):
    print(c)

 while condition:
 	# loop block

// Printing Hello World 5 times

c = "Hello World"
n = 5

while n:
    print(c)
    n -= 1

for iterator in range(range_variable or constant):
	for iterator in range(range_variable or constant):
		# loop body
 

n = int(input("Enter the number of rows: "))

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