Square

function square([n]) {
    if(n%2==0){
        let dash= '-'.repeat(n-2);
        let freespace = ' '.repeat(n-2);
        console.log('+' + dash+ '+' + dash+ '+');
        for (let i = 0; i < ((n-3)/2)-1; i++) {
            console.log('|' + freespace + '|' + freespace + '|');
        }
        console.log('+' + dash+ '+' + dash+ '+');
        for (let i = 0; i < ((n-3)/2)-1; i++) {
            console.log('|' + freespace + '|' + freespace + '|');
        }
        console.log('+' + dash+ '+' + dash+ '+');

    }
    else if (n%2==1){
        let dash = '-'.repeat(n-2);
        let freespace = ' '.repeat(n-2);
        console.log('+' + dash + '+' + dash + '+');
        for (let i = 0; i < (n-3)/2; i++) {

            console.log('|' + freespace + '|' + freespace + '|');
        }
        console.log('+' + dash + '+' + dash + '+');
        for (let i = 0; i < (n-3)/2; i++) {

            console.log('|' + freespace + '|' + freespace + '|');
        }
        console.log('+' + dash + '+' + dash + '+');
    }
}