var arr = [435,6,234,23,434,6545,623,123];
for(var i = 0 ; i < arr.length - 1; i++){
for(var j = 0; j < arr.length - i - 1 ; j++){
if(arr[j] > arr[j + 1]){
var temp = arr[j];
arr[j] = arr[j + 1];
arr[j + 1] = temp;
}
}
}
console.log(arr);
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