Hello I want a deatiled explanation for every step in this code thanks function

Question

Hello I want a deatiled explanation for every step in this code thanks
function [ En ] = Encryption(x,K)
FWD=['A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K' 'L' 'M' 'N' 'O' 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' 'X' 'Y' 'Z']; REV=['Z' 'Y' 'X' 'W' 'V' 'U' 'T' 'S' 'R' 'Q' 'P' 'O' 'N' 'M' 'L' 'K' 'J' 'I' 'H' 'G' 'F' 'E' 'D' 'C' 'B' 'A']; NUMBER=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26]; kk=1; for xx=1:size(x,2) for yy=1:26 if x(xx)==FWD(yy); inp(kk)=FWD(yy); en(kk)=REV(yy); ennumer(kk)=NUMBER(yy); C(kk)=ennumer(kk)+K; kk=kk+1; break end end end fprintf('The input word is: %s ',inp()) fprintf('The substituion word is: %s ',en()) ennumer() C() L=1; for p=1:size(C,2) for q=1:26 if C(p)==NUMBER(q); decrp(L)=FWD(q-K); end
end decrp() end
>> Encryption('HELLO',5) The input word is: HELLO The substituion word is: SVOOL
ennumer =
8 5 12 12 15

C =
13 10 17 17 20

ans =
H

decrp =
E

decrp =
L

decrp =
L

decrp =
O
>> Hello I want a deatiled explanation for every step in this code thanks
function [ En ] = Encryption(x,K)
FWD=['A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K' 'L' 'M' 'N' 'O' 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' 'X' 'Y' 'Z']; REV=['Z' 'Y' 'X' 'W' 'V' 'U' 'T' 'S' 'R' 'Q' 'P' 'O' 'N' 'M' 'L' 'K' 'J' 'I' 'H' 'G' 'F' 'E' 'D' 'C' 'B' 'A']; NUMBER=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26]; kk=1; for xx=1:size(x,2) for yy=1:26 if x(xx)==FWD(yy); inp(kk)=FWD(yy); en(kk)=REV(yy); ennumer(kk)=NUMBER(yy); C(kk)=ennumer(kk)+K; kk=kk+1; break end end end fprintf('The input word is: %s ',inp()) fprintf('The substituion word is: %s ',en()) ennumer() C() L=1; for p=1:size(C,2) for q=1:26 if C(p)==NUMBER(q); decrp(L)=FWD(q-K); end
end decrp() end
>> Encryption('HELLO',5) The input word is: HELLO The substituion word is: SVOOL
ennumer =
8 5 12 12 15

C =
13 10 17 17 20

ans =
H

decrp =
E

decrp =
L

decrp =
L

decrp =
O
>> Hello I want a deatiled explanation for every step in this code thanks
function [ En ] = Encryption(x,K)
FWD=['A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K' 'L' 'M' 'N' 'O' 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' 'X' 'Y' 'Z']; REV=['Z' 'Y' 'X' 'W' 'V' 'U' 'T' 'S' 'R' 'Q' 'P' 'O' 'N' 'M' 'L' 'K' 'J' 'I' 'H' 'G' 'F' 'E' 'D' 'C' 'B' 'A']; NUMBER=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26]; kk=1; for xx=1:size(x,2) for yy=1:26 if x(xx)==FWD(yy); inp(kk)=FWD(yy); en(kk)=REV(yy); ennumer(kk)=NUMBER(yy); C(kk)=ennumer(kk)+K; kk=kk+1; break end end end fprintf('The input word is: %s ',inp()) fprintf('The substituion word is: %s ',en()) ennumer() C() L=1; for p=1:size(C,2) for q=1:26 if C(p)==NUMBER(q); decrp(L)=FWD(q-K); end
end decrp() end
>> Encryption('HELLO',5) The input word is: HELLO The substituion word is: SVOOL
ennumer =
8 5 12 12 15

C =
13 10 17 17 20

ans =
H

decrp =
E

decrp =
L

decrp =
L

decrp =
O
>>

Explanation / Answer

function [ En ] = Encryption(x,K)

%Alphabets in forward order stroed in FWD array

FWD=['A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K' 'L' 'M' 'N' 'O' 'P' 'Q' 'R' 'S' 'T' 'U' 'V' 'W' 'X' 'Y' 'Z'];

%Alphabets in reverse order stored in REV array

REV=['Z' 'Y' 'X' 'W' 'V' 'U' 'T' 'S' 'R' 'Q' 'P' 'O' 'N' 'M' 'L' 'K' 'J' 'I' 'H' 'G' 'F' 'E' 'D' 'C' 'B' 'A'];

% Numbers 1 to 26 stroed in NUMBER array

NUMBER=[1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26];

kk=1;

%This for loop length of x times. Size(x) gives 1 by 2 arrow and number of

% rows equal to 1. so here size(x,2) using or we can use length(x)

for xx=1:size(x,2)%xx runnig from 1 to length of xx

for yy=1:26 %yy running from 1 to 26

if x(xx)==FWD(yy);% Comparing input with FWD array

inp(kk)=FWD(yy);% inp() array stores input

en(kk)=REV(yy); % en() array stores input in reverse order equivalent alphabets.

ennumer(kk)=NUMBER(yy); % ennumer() stores input as number

C(kk)=ennumer(kk)+K; %C() stores ennumer + K as array

kk=kk+1;

break

end

end

end

fprintf('The input word is: %s ',inp()); % Printing input

fprintf('The substituion word is: %s ',en()); % Printing en() array

ennumer(); % printing ennumer() [ which input alphabets equivalent numbers]

C(); % Printing C();

%In this for loop deencryption done

L=1;

for p=1:size(C,2)

for q=1:26

if C(p)==NUMBER(q); % If encrypted number equal to number in NUMBER array

decrp(L)=FWD(q-K);% Then decrypted letter

end

end

decrp()% Printing Decrypted Letter

end

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