14. Intermediate Javascript

BootCamp by Dr.Angela

1. Random Number Generation

• Generate random numbers
  • var n = Math.random();
• Returns a number between 0 (inclusive) and 1 (exclusive)
• Change range
  • Math.floor(n * x) + 1;
  • Generates a number between 1 and x

2. Control Statements – If / Else

• If / Else condition
  • if (track === "clear") { goStraight(); } else { turnRight(); }
• Tip : Use a flowchart to visualize logic

3. Comparators and Equality

• ===(is equal to), !==(is not equal to), >(greater than), <(less than), >=(greater than or equal to), <=(less than or equal to)

4. Combining Conditions

• &&(AND), ||(OR), !(NOT)

5. Arrays (Collections)

• ex) var list = ["A", "B", "C"];
• Length : list.length;
• Access element : list[x]; // index starts from 0
• Check if value exists : list.includes("A"); // returns true or false

6. Adding Elements to Arrays

• Add to the end : list.push("D");

7. While Loop

• while (condition) { // do something }
• Runs while the condition is true
• Used for state-based repetition

8. For Loop

• for (let i = 0; i < 2; i++) { // do something }
• Structure : (start; condition; change)
• Used to iterate a specific number of times