Lonely Integer

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    function lonelyinteger(a) {
        let result,i,j;
        for(i=0; i<a.length; i++){
            let count = 0;
            for(j=0; j<a.length; j++){
                if(a[i]==a[j]){
                    count++;
                }
            }
            
            if(count==1){
                result = a[i];
            }
        }
        return result
    }