# If Statements

You use the if statement to test simple conditions with only a few possible outcomes. They syntax for the if statement is

Execute a single line of code with an if statement

if(boolean expression)
//This line of code will run if the condition is true


Execute multiple lines of code

if(boolean expression){
// All the code from the beginning of the { to the end of the }
// will be executed, when the boolean expression
//evaluates to true.
}


## if

int temperatureInDegrees = 100;

if(temperatureInDegrees == 100){
//Its now at boiling point
}


## if-else

int temperatureInDegrees = 100;

if(temperatureInDegrees <= 0){
//Its very cold, its below freezing point
}else{
// Its not below freezing point
}


## if-else if-else

boolean enteredDoorCode = true;
boolean passedRetinaScan = true;

if(enteredDoorCode){
// Allow entry
} else if(passedRetinaScan){
// Allow entry
} else {
//Deny access
}