Unit-06.md

Conditions

If…Else

if statement to specify a block of code to be executed if a condition is true. else statement to specify a block of code to be executed if the condition is false.

if (condition) {
  // block of code to be executed if the condition is true
} else {
  // block of code to be executed if the condition is false
}

else if statement to specify a new condition if the first condition is false. 

if (condition1) {
  // block of code to be executed if condition1 is true
} else if (condition2) {
  // block of code to be executed if the condition1 is false and condition2 is true
} else {
  // block of code to be executed if the condition1 is false and condition2 is 	false
}

Switch

Instead of writing many if..else statements, you can use the switch statement. The switch statement selects one of many code blocks to be executed:

switch(expression) {
  case x:
    // code block
  case y:
    // code block
  default:
    // code block
}

This is how it works:

• The switch expression is evaluated once
• The value of the expression is compared with the values of each case
• If there is a match, the associated block of code is executed
• The default statement is optional, and specifies some code to run if there is no case match