if else in javascript

if (condition1) {
  // code to be executed if condition1 is true
} else if (condition2) {
  // code to be executed if the condition1 is false and condition2 is true
} else {
  // code to be executed if the condition1 is false and condition2 is false
}var age=20;
if (age < 18) {
	console.log("underage");
} else {
	console.log("let em in!");
}if (5 < 10) {
	console.log("5 is less than 10");
} else {
	console.log("5 is now bigger than 10")
}let A = 1;
let B = 0;
if (A == 1 || B == 1){
  	// some code here
}  if (a > 0) {
    result = 'positive';
  } else {
    result = 'NOT positive';
  }if ( x > 10 )
{
cout << "x is greater than 10";
}
else
{
cout << "x is less than 10";
}