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•logical operator•if•if else•switch•while•do while•for

Third step for Learning C++ Programming

Third step for Learning C++ Programming

Repetition Control Structures

2

&& Operator (logical AND opterator)

&& is a boolean operator, so the value of an expression is true or false.

( cond1 && cond2 )

is true only if both cond1 and cond2 are true.

3

|| Operator (logical OR operator)

|| is a boolean operator, so the value of an expression is true or false.

( cond1 || cond2 )

is true if either of cond1 or cond2 is true.

4

The ! operator (logical NOT operator)

The ! operator is a unary boolean operatorunary means it has only 1 operand.

! negates it's operand.! means "not".

(! condition)is true only when condition is false

5

[ Practice 01 logical operator ]

6

[ Explain 01 logical operator ]

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if structure

The if control structure allows us

to state that an action (sequence

of statements) should happen

only when some condition is true:

if (condition )action;

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[ Practice 02 if ]

9

[ Explain 02 if ]

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if else structure

The if else control structure allows you to specify an alternative action:

if ( condition ) action if trueelse

action if false

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[ Practice 03 if else ]

12

[ Explain 03 if else ]

13

Syntaxswitch (expression)

{case const-expr :

statements;break;

case const-expr :statements;break;

…default statements;

break;}

switch statementswitch statement

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[ Practice 04 switch ]

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[ Explain 04 switch ]

0 ≦ code ≦ 4

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while Control Structurewhile Control Structure

The while control structure supports repetition - the same statement (or compound statement) is repeated until the condition is false.

while (condition)do something;

•the the inside is called

inside is called

•the "body of the loop"

the "body of the loop"

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[ Practice 05 while ]

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[ Explain 05 while ]

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do whiledo while

The do while control structure also provides repetition, this time the condition is at the bottom of the loop.the body is always executed at least once

do somestuff ;

while ( condition );

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[ Practice 06 do while ]

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[ Explain 06 do while ]

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for loops

The for control structure is often used for loops that involve counting.

You can write any for loop as a while (and any while as a for).

for (initialization; condition; update)do something;

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[ Practice 07 for ]

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[ Explain 07 for ]

Thank you