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do {
    // Even though the condition evaluates to false
    // this loop's body will still execute once.
    alert( "Hi there!" );
 
} while ( false );

carlosrojaso

var i = 0;
while ( i < 100 ) {
    // This block will be executed 100 times.
    console.log( "Currently at " + i );
    i++; // Increment i
}

carlosrojaso

for ( var i = 0; i < 5; i++ ) {
    // Logs "try 0", "try 1", ..., "try 4".
    console.log( "try " + i );
}

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var stuffToDo = {
 
    "bar": function() {
        alert( "the value was bar -- yay!" );
    },
 
    "baz": function() {
        alert( "boo baz :(" );
    },
 

carlosrojaso

// A switch statement
 
switch ( foo ) {
 
    case "bar":
        alert( "the value was bar -- yay!" );
        break;
 
    case "baz":
        alert( "boo baz :(" );

carlosrojaso

// Flow control
 
var foo = true;
var bar = false;
 
if ( bar ) {
    // This code will never run.
    console.log( "hello!" );
}
 

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// Comparison operators
 
var foo = 1;
var bar = 0;
var baz = "1";
var bim = 2;
 
foo == bar; // false
foo != bar; // true
foo == baz; // true; but note that the types are different

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// Do something with foo if foo is truthy.
foo && doSomething( foo );
 
// Set bar to baz if baz is truthy;
// otherwise, set it to the return value of createBar()
var bar = baz || createBar();

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// Multiplication and division
2 * 3;
2 / 3;

carlosrojaso

// Concatenation
var foo = "hello";
var bar = "world";
 
console.log( foo + " " + bar ); // "hello world"