in this presentation i will explain you about Statements & block, If Else, ElseI f, Switch, While Loop, For loop, Do while loop, Break & continue in c++

2.  Statements & block
 If Else
 Else If
 Switch
 While Loop
 For loop
 Do while loop
 Break & continue
 Goto & labels

3.  Expression+; = staement;
 More than one staement is called
compund staments.
Single stament
Compund staments

4.  When a group of statements or
compund staments protected by open
and close braces is called block.
Open brace
Block of codes
Close brace

5.  Braces surrounded the staments of
function definition.
Open brace
Function definition
Close brace

6.  Braces surround multiple statements
of loop constructs too.
Open brace
Loop multiple
statements
Close brace

11.  Write a program to take two float
numbers and do these tasks upon
them
◦ Multiplication
◦ Division
◦ Subtraction
◦ Addition
◦ & find remainder

12.  If – else is used to control the flow with
the condition.
 In If-Else, if the IF test is true then if
statements will executes.
 if IF test is false then Else staements will
execute.
 Be – careful to put open & close braces if
you have more than one staement in IF
or ELSE part.

13.  Here is an example of if-else
 IF test is not true so the else part will
execute.

15.  Here we can check as much test as we
want.
 Each else work will like separate IF.
 All have one else.
 If all test fails then only else part will
excute.
 As i told we can do any number of tests.
 But it takes hell amount of time. To avoid
this we will use switch – case.

16. If (tes-expression)
True –statement;
Else If (tes-expression)
True –statement;
Else If (tes-expression)
True –statement;
Else If (tes-expression)
True –statement;
Else If (tes-expression)
True –statement;
Else
False statement;

18. Switch (expression){
Case constant-expression:
statement;
Break;
Case constant-expression:
statement;
Break;
Case constant-expression:
statement;
Break;
Case constant-expression:
statement;
Break;
Default: statement;
}

19.  In switch-case ,we are switching on a
expression . The expression must be
integer value. We can do switch
caseupon string, float or anything else.
 There are more than one case.
 Here we are comparing the case value
with switch.
 We have a default value if none of case
satisfies.

22.  Executing a block of code for a certain no of
periods.
 We need a condition to test.
 We have to increment or decrement.
 If we have more than one statement then we
need to put those within curly brace’{}’
 We have three types of loops
◦ For loop
◦ While loop
◦ Do – while loop

23.  For a loop we need
 Initialized from where you want to start
◦ I = 0 or [or any number from where you want]
 Test expression or you can say test
condition
◦ I <= or< or >= or > [certain value]
 Adjustments(increment or decrement)
◦ i++
◦ i--

26.  When we don’t use any initializer, test-
expression & adjustment. The loop
becomes infinite loop.
 Can we use infinite loop? Yes but with a
break and a condition.
 The loop will continue infinite until unless
our condition satisfies. Once condition
satisfies we will come out using break;
statement.

28.  In while loop we have only test-
expression is tested.
 If expression testing results true then
the statement or statements executes.

31.  In do while loop first the statements
executes
 Next is testing expression
 Here the must run once even the
expression test id false.
 But in for & while to execute statement
the expression must be true

35.  Write all the three programs which I
showed you on previous slide
initializing the I value to ‘7’.
 Answer us what you will get and
when?

36.  Write a program to display 1 to 100
using
 For loop
 While loop
 Do-while loop

37. 1. Write a program to display all odd numbers in
between 1 to 50.advise
1. Use for/while loop
2. Write a program to display all even numbers in
between 1 to 50.advise
1. Use for/while loop
3. Write a program to display all numbers in between 1
to 50 which are less than 26.advise
1. Use for/while loop
4. Write a program to display all numbers in between 1
to 50 which are greater than 25.advise
1. Use for/while loop

38.  When break occurs it send the
execution to out of the loop or switch.
 When continue occurs it sends the
execution right to the testing
expression.
 These two can be used inside of
switches and loops

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