freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/golf-code/index.md

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Golf Code

Golf Code

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Hints

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Problem Explanation

Change the code below // Only change code below this line and above // Only change code above this line.

Ensure that you're editing the inside of the golfScore function.

You will have to make the function return exactly the same string as shown shown in the table, depending on the value of the parameters par and strokes that are passed to your function.

Hint 1

+number -number can be used to increase or decrease a parameter in your condition.

Hint 2

You use if / else if chains to return different values in different scenarios.

Hint 3

Control the flow of your function based on the tables order of priority - top (highest) to bottom (lowest) to return matching string values.

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Solutions

Solution 1 (Click to Show/Hide)

function golfScore(par, strokes) {
  // Only change code below this line
  if (strokes == 1) {
    return "Hole-in-one!";
  } else if (strokes <= par - 2) {
    return "Eagle";
  } else if (strokes == par - 1) {
    return "Birdie";
  } else if (strokes == par) {
    return "Par";
  } else if (strokes == par + 1) {
    return "Bogey";
  } else if (strokes == par + 2) {
    return "Double Bogey";
  } else {
    return "Go Home!";
  }
  // Only change code above this line
}
// Change these values to test
golfScore(5, 4);

Code Explanation

• Compare the parameters par and strokes to return appropriate string values.
• if / else if chain is used for flow control.
• String "Go Home!" is returned for every condition where strokes is greater than or equal to par + 3.

Solution 2 (Click to Show/Hide)

var names = [
  "Hole-in-one!",
  "Eagle",
  "Birdie",
  "Par",
  "Bogey",
  "Double Bogey",
  "Go Home!"
];
function golfScore(par, strokes) {
  // Only change code below this line
  if (strokes == 1) {
    return names[0];
  } else if (strokes <= par - 2) {
    return names[1];
  } else if (strokes == par - 1) {
    return names[2];
  } else if (strokes == par) {
    return names[3];
  } else if (strokes == par + 1) {
    return names[4];
  } else if (strokes == par + 2) {
    return names[5];
  } else {
    return names[6];
  }
  // Only change code above this line
}

// Change these values to test
golfScore(5, 4);

Code Explanation

Since we already have an array defined in the variable names we can take advantage of it and use it for our return statements using indexes (eg: names[0] is the first one). That way, if you ever need to change a specific result you wouldn't need to look for it inside the function, it'd be at the beginning, in your array.

Solution 3 (Click to Show/Hide)

(Using Multiple Conditional (Ternary) Operators)

function golfScore(par, strokes) {
  return strokes == 1
    ? names[0]
    : strokes <= par - 2
    ? names[1]
    : strokes == par - 1
    ? names[2]
    : strokes == par
    ? names[3]
    : strokes == par + 1
    ? names[4]
    : strokes == par + 2
    ? names[5]
    : strokes >= par + 3
    ? names[6]
    : "Change Me";
}

Relevant Links

• Golf
• Challenge: Chaining If Else Statements
• Challenge: Comparison with the Greater Than Equal To Operator
• Challenge: Comparison with the Less Than Equal To Operator
• "Array" - MDN JavaScript reference
• Use Multiple Conditional (Ternary) Operators