Conditional Statements
Need to take different actions for different decisions
* In PHP we have the following conditional statements :
1. if statement - executes some code only if a specified condition is true
2. if...else statement - executes some code if a condition is true and another code if the condition is false
3. if...elseif....else statement - selects one of several blocks of code to be executed
4. switch statement - selects one of many blocks of code to be executed
