control-flow.md

➲ Control Flow:

Control flow statements decides the execution flow of the PHP program based on certain conditions.

☴ Overview:

1. If Else Statements
2. Nested If Else Statements
3. Switch Statements

✦ If Else Statements:

This if..else statements will allow to execute the code based on the specified condition is true or false.

Syntax:

if (condition) {
  // Code to be executed if the condition is true
} else {
  // Code to be executed if the condition is false
}

Example:

$age = 30;

if ($age >= 18) {
  echo "You are eligible to cast your vote";
} else {
  echo "You are not eligible to cast your vote";
}

✦ Nested If Else Statements:

It implements the complex control flow of the PHP program with the help of nested if..else statements.

Example:

$price = 2000;

if ($price > 2000) {
  echo "You have discount of 25%";
} else if ($price < 2000 && $price > 1000) {
  echo "You have discount of 10%";
} else {
  echo "No discount eligible";
}

✦ Switch Statements:

It provides simplest way to handle and switch to desired condition among multiple conditions with same variable.

Syntax:

switch (expression) {
  case value1:
    // Code to execute if the expression equals to value1
    break;
  case value2:
    // Code to execute if the expression equals to value2
    break;
  // more cases if necessary
  default:
    // Code to execute if the no match found for the expression (optional)
  	break;
}

Example:

$day = 'monday';

switch ($day) {
	case 'monday':
		echo "Monday is weekday";
		break;

	case 'tuesday':
		echo "Tuesday is weekday";
		break;

	case 'wednesday':
		echo "Wednesday is weekday";
		break;

	case 'thursday':
		echo "Thursday is weekday";
		break;

	case 'friday':
		echo "Friday is weekday";
		break;
	
	default:
		echo "Saturday and Sunday are weekends";
		break;
}

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