Answer check

Write the answer validation function.

What is answer checking?

Answer checking is a function that determines whether the user's answer is correct. The question's dogruIndex is compared with the index chosen by the user. The result returns a boolean: true means correct, false means wrong.

function checkAnswer(correctIndex: number, answer: number): boolean {
  return correctIndex === answer;
}

Strict equality comparison

The === operator is used in answer checking. It compares both value and type; for example 0 === 0 is true but "0" === 0 is false. This prevents unexpected type conversions and makes the comparison safe.

Exercise cevapKontrol function

Define a cevapKontrol function: (dogruIndex: number, cevap: number): boolean. Its body should return dogruIndex === cevap. Print the result of calling cevapKontrol(1, 1) with console.log.

Show example solution

function cevapKontrol(dogruIndex: number, cevap: number): boolean {
  return dogruIndex === cevap;
}
console.log(cevapKontrol(1, 1));

Test yourself

What type does the cevapKontrol function return?
- boolean
- void
- string
- number
Show answer

boolean — Answer checking returns a correct/wrong result, so it returns a boolean value.

Strict equality operator

function cevapKontrol(dogruIndex: number, cevap: number): boolean {
  return dogruIndex ____ cevap;
}

Show answer

function cevapKontrol(dogruIndex: number, cevap: number): boolean {
  return dogruIndex === cevap;
}

Answer checking concepts

dogruIndex

Correct answer index
cevap

User's choice
boolean

Return type
===

Strict equality

Next lesson: Score calculation

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