Loops are used to repeat a block of code. Being able to have your program repeatedly execute a block of code is one of the most basic but useful tasks in programming like C, C++ , Java, Python, .Net etc.

There are 3 sections of Loop:

• Variable initialization.( e.g int x=0; )
• condition( e.g while( x<=10) )
• Variable increment or decrement ( x++ or x– or x=x+2 )

Types of Loop:

1. Entry Control Loop:
2. For Loop

for ( variable initialization; condition; variable update ) {

  Code to execute while the condition is true

}

1. While Loop

variable initialization ;while (condition){ statements ; variable update; }

2. Exit Control Loop:

            Do – While Loop

variable initialization ;Do{         statements ;          variable updates;  } while (condition);

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