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# Cannot make sense of the quiz involving foreach

I am trying to understand the following code in quiz but to no veil.

```\$numbers = array(1,2,3,4);

\$total = count(\$numbers);

\$sum = 0;

\$output = "";

\$i = 0;

foreach(\$numbers as \$number) {

\$i = \$i + 1;

if (\$i < \$total) {

\$output = \$number . \$output;

}

}

echo \$output;
``` ```<?php
\$output = \$number . \$output;
```

Adding a string type to a number type converts that number to a string. So instead of addition, concatenation of the two strings happens.

When \$number is 1 --- \$output = 1 + "" == "1" + "" results in "1"

When \$number is 2 --- \$output = 2 + "1" == "2" + "1" results in "21"

When \$number is 3 --- \$output = 3 + "21" == "3" + "21" results in "321"

4 won't be included because when \$i = 4 it is not less than 4. A few other languages do this as well (JavaScript and Java, at least I think). Please let me know if this helped!