Pattern Programs in Javascript - 1
It starts with a string originalStr which is set to 'HELLO'.
It then creates an empty string called pattern to store the pattern that will be generated.
It reverses the original string. So, 'HELLO' becomes 'OLLEH'. This is stored in reverseStr.
It then adds the original string followed by a newline character '\n' to the pattern. So, at this point, pattern contains 'HELLO\n'.
Next, it enters into a loop that starts from the second character ('E') and ends at the second-to-last character ('L') of the original string ('HELLO'). This loop is controlled by the variable i.
Inside this loop, it adds the current character from the original string to the pattern. For example, in the first iteration, it adds 'E'. Then, it enters into another loop controlled by the variable j.
This nested loop also starts from the second character ('E') and ends at the second-to-last character ('L') of the original string ('HELLO'). This loop is controlled by the variable j.
Inside this nested loop, it adds spaces to the pattern for the same number of characters as the length of the original string ('HELLO') minus 2 (because we don't want to add spaces for the first and last characters). So, in this case, it adds three spaces (' ') because the original string length is 5.
After adding spaces, it adds the character from the reversed string corresponding to the current position. For example, in the first iteration, it adds 'L' from the reversed string 'OLLEH'. Then, it adds a newline character '\n' to move to the next line in the pattern.
This process continues for each character in the original string except the first and last characters.
After the loops are finished, it adds the reversed string reverseStr to the pattern.
Finally, it prints the pattern to the console.
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