Unit 2 Loop Control Statements LECTURE

1
Unit 2 Loop Control Statements
LECTURE 16

• Loop A Loop is defined as a block of statements
  which are repeatedly executed for certain number
  of times.
• Steps in Loops
• Loop Variable It is a variable used in the Loop.
•  
• Initialization It is the 1st step in which
  starting final value is assigned to the loop
  variable. Each time the updated value is checked
  by the loop itself.
•  
• Increment/Decrement It is the numerical value
  added or subtracted to the variable in each round
  of the loop.

2
Unit 2 Loop Control Statements
LECTURE 16

• Syntax of loop
• for (expression-1 expression-2 expression-3)
• statement
• While
• expression-1
• while (expression-2)
• statement
• expression-3
• do-while
• expression-1
• do
• statement
• expression-3
• while (expression-2)

3
Unit 2 Loop Control Statements
LECTURE 16

• for(initialize counter test counter
  increment/decrement counter)
• The for statements is equivalent to while and
  do-while statements. The only difference between
  for and while is that the letter cheeks the
  logical condition and then executes the body of
  the loop, where as in for statements test is
  always performed at the beginning of the loop.
  The body of the loop may not be executed at all
  times if the condition fails at the beginning.

4
Unit 2 Loop Control Statements
LECTURE 16

• Q. WAP To Print 5 Natural No using while Loop.
•  
• includeltstdio.hgt
• void main()
• int n
• n1
• while (nlt5)
• printf( \n Number is d,n)
• n

5
Unit 2 Loop Control Statements
LECTURE 16

• Q. WAP To Print 5 Natural No using do-while Loop.
•  
• includeltstdio.hgt
• void main()
• int n
• n1
• do
• printf( \n Number is d,n)
• n
• while (nlt5)

6
Unit 2 Loop Control Statements
LECTURE 16

• Q. WAP To Print 5 Natural No using for Loop.
•  
• includeltstdio.hgt
• void main()
• int n
• for(n1nlt5n)
• printf( \n Number is d,n)

7
Unit 2 Loop Control Statements
LECTURE 16

• Q. WAP To Print Odd Even No using for Loop.
•  
• includeltstdio.hgt
• void main()
• int n
• for(n1nlt5n)
• if (n2 0)
• printf( \n Number is Even d,n)
• else
• printf( \n Number is Odd d,n)

8
Unit 2 Loop Control Statements
LECTURE 16

• Thanks