JavaScript if/else Statement

Syntax

The if statement specifies a block of code to be executed if a condition is true:

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

The else statement specifies 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
}

The else if statement specifies 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
}