# Explaination on how the decryption of the vignere cipher works.        String d_result = "";...

###### Question:

Explaination on how the decryption of the vignere cipher works.

String d_result = "";

str = str.toUpperCase();

for(int i = 0, j = 0; i < str.length(); i++)

{

char c = str.charAt(i);

if(c < 'A' || c >'Z')

continue;

result += (char)((c - k.charAt(j)+ 26)% 26 + 'A');

j = ++j % k.length();

}

return d_result;

}

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