コンソールログインjavascript機能

Question

const getAverage = (numberOne, numberTwo) => { 
    const average = (numberOne + numberTwo)/2 ; 
    console.log(average); 
}; 

getAverage(365, 27); 
// Output: 196 

const getAverage = (numberOne, numberTwo) => { 
    const average = (numberOne + numberTwo)/2 ; 
    return average; 
}; 

getAverage(365, 27); 
// Output: SyntaxError: Identifier 'getAverage' has already been declared 
at <anonymous>:1:1 

なぜですか？

Answer 1

これらの関数が同じ場所にある場合は、同じ関数名を使用しているという問題があります。

const getAverage = (numberOne, numberTwo) => { 
 
\t const average = (numberOne + numberTwo)/2 ; 
 
\t console.log(average); 
 
}; 
 

 
getAverage(365, 27); 
 

 

 
const getAverage2 = (numberOne, numberTwo) => { 
 
    const average = (numberOne + numberTwo)/2 ; 
 
    return average; 
 
}; 
 

 
console.log(getAverage2(365, 27));