programming basics if then else, switch, operators
Post on 31-Oct-2014
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MS Alam TRIVUz
Founder, TRIVUz Network
PF02Programming
Fundamentals
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Class Id:
Recap PF01
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We learn before We Define Computer & Program
Define Computer Programming
Programming Process
Programming Language
Inputs & Outputs
Define Logical Processing
Variables
Data TypesProgramming Fundamentals
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www.trivuzacademy.com
We will learn today
Conditional Statement
If… then … else
Switch statement
Operators
Programming Fundamentals
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• Conditional statements are the set of command used to perform different actions base on different conditions
• In PHP we have the following conditional statements:• if• if else• else if• switch
Conditional Statement
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If statement
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execute some code only if statement is true
If…
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If…
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if
If…
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if (conditional)
If…
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if (conditional) {
If…
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if (conditional) { // statement to be executed
If…
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if (conditional) { // statement to be executed}
If…
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if ($math < 33) { $result = “Failed!”;}
Example:
If…else statement
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execute some code if statement is true
and some other code if statement is false
If…else…
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if (conditional) { // statement if true}
If…else…
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if (conditional) { // statement if true} else
If…else…
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if (conditional) { // statement if true} else { // statement if false
If…else…
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if (conditional) { // statement if true} else { // statement if false}
If…else…
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if ($math < 33) { $result = “Failed!”;} else { $result = “Passed!”;}
Example:
If…else if…else statement
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execute some code if statement is true
And some other code if statement is false
If…else if…else
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if (conditional) { // statement if true} else if (conditional){ // statement if false and else if true} else { // statement if all false}
If…else if…else
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if (conditional) { // statement if true } else if (conditional){ // whichever matches first } else if (conditional){ // whichever matches first } else if (conditional){ // whichever matches first } else if (conditional){ // whichever matches first } else { // statement if all false}
If…else if…else
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if ($avg > 100) { $grade = "Invalid"; } else if ($avg > 90 and $avg < 100 ) { $grade = "A+"; } else if($avg > 80 and $avg < 90) { $grade = "A"; } else { $grade = "F"; }
Example:
switch statement
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Select one of many block of code to execute
switch
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switch
switch
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switch (value)
switch
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switch (value) {
switch
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switch (value) { case 1: // some code to execute
switch
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switch (value) { case 1: // some code to execute break;
switch
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switch (value) { case 1: // some code to execute break; case 2: // some code to execute break;
switch
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switch (value) { case 1: // some code to execute break; case 2: // some code to execute break; default: // nothing matches, do it
switch
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switch (value) { case 1: // some code to execute break; case 2: // some code to execute break; default: similar to else in if..else
// nothing matches, do it
switch
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switch (value) { case 1: // some code to execute break; case 2: // some code to execute break; default: // nothing matches, do it}
switch
switch (n){case label1: code to be executed if n=label1; break;case label2: code to be executed if n=label2; break;default: code to be executed if n is different from both label1 and label2;}
Syntax
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<html><body><?php switch ($x) { case 1: echo "Number 1"; break; case 2: echo "Number 2"; break; case 3: echo "Number 3"; break; default: echo "No number between 1 and 3"; }?></body></html>
Example
switch
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PHP Operators
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Operators are used to operate on values
Operators
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Arithmetic Operators
Operators
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Assignment Operators
Operators
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Comparison Operators
Operators
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Logical Operators
Thank You
MS Alam TRIVUzFounder, TRIVUz Academytrivuz@gmail.com
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