# Issue

*This Content is from Stack Overflow. Question asked by Bennpoes *

I have `Uncaught SyntaxError: Unexpected identifier`

when I define a `const`

variable in a code block. I have already checked if I missed a extra comma, colon, parenthesis, quote or bracket. But still get the error after I replaced the comma into curly brackets. It works when I remove the variables and replace the `a`

in `Math.pow`

in 10. So what is going wrong with the const variables?

```
const multipleCircles = [{
calc1: {
const a = 10;
area: Math.PI * Math.pow(a, 2);
},
calc2: {
const a = 100;
area: Math.PI * Math.pow(a, 2);
}
}];
console.log(multipleCircles);
```

# Solution

It is not clear what you are trying but the closest with the least change to your code is this

```
const multipleCircles = [{
calc1: () => {
const a = 10;
return Math.PI * Math.pow(a, 2);
},
calc2: () => {
const a = 100;
return Math.PI * Math.pow(a, 2);
}
}];
console.log(multipleCircles[0].calc1());
console.log(multipleCircles[0].calc2());
```

This Question was asked in StackOverflow by Bennpoes and Answered by mplungjan It is licensed under the terms of CC BY-SA 2.5. - CC BY-SA 3.0. - CC BY-SA 4.0.