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Sagot :
Certainly! Let's break down and analyze the given program step by step to answer the question.
Here's the structure of the program:
1. Clear Screen:
```plaintext
CLS
```
This clears the screen, making sure there are no previous inputs or outputs displayed.
2. Input String from User:
```plaintext
INPUT "Enter any string"; B\[tex]$ ``` This prompts the user to enter a string, which is stored in the variable `B$[/tex]`.
3. Initialize the Loop:
```plaintext
FOR I=LEN(B\[tex]$) TO 1 STEP -1 ``` This is a loop that starts from the length of the string `B$[/tex]` and decrements down to 1. `LEN(B[tex]$)` calculates the number of characters in `B$[/tex]`.
4. Reverse the String:
```plaintext
C\[tex]$=C\$[/tex]+MID\[tex]$(B\$[/tex], 1,1)
```
The `MID[tex](Q&A) - Read The Following Program And Answer The Given QuestionplaintextCLSINPUT Enter Any String Btex FOR I LENBtex TO 1 STEP 1 Ctex Ctex MIDtexBtex I 1NEXT IPRINT Th - Westonci.ca PESWP
(Q&A) - Read The Following Program And Answer The Given QuestionplaintextCLSINPUT Enter Any String Btex FOR I LENBtex TO 1 STEP 1 Ctex Ctex MIDtexBtex I 1NEXT IPRINT Th - Westonci.ca 45EZV
```
After the loop completes, it prints the concatenated string, which should be the reverse of the original input string.
7. End Program:
```
END
```
This indicates the end of the program execution.
### Analysis and Main Purpose:
The purpose of the given program is to reverse the string entered by the user and then display the reversed string.
### Step-by-Step Operation:
1. User is prompted to enter a string `B[tex]"Q&A" - Read The Following Program And Answer The Given QuestionplaintextCLSINPUT Enter Any String Btex FOR I LENBtex TO 1 STEP 1 Ctex Ctex MIDtexBtex I 1NEXT IPRINT Th - Westonci.ca S52O1
3. During each iteration, the current character (extracted using `MID[tex]$(B$[/tex], 1,1)`) is appended to the new string `C[tex] Read The Following Program And Answer The Given QuestionplaintextCLSINPUT Enter Any String Btex FOR I LENBtex TO 1 STEP 1 Ctex Ctex MIDtexBtex I 1NEXT IPRINT Th - Westonci.ca 249QG
### Final Answer:
a. The main purpose of the given program is to reverse a string entered by the user.
Answer Link
Here's the structure of the program:
1. Clear Screen:
```plaintext
CLS
```
This clears the screen, making sure there are no previous inputs or outputs displayed.
2. Input String from User:
```plaintext
INPUT "Enter any string"; B\[tex]$ ``` This prompts the user to enter a string, which is stored in the variable `B$[/tex]`.
3. Initialize the Loop:
```plaintext
FOR I=LEN(B\[tex]$) TO 1 STEP -1 ``` This is a loop that starts from the length of the string `B$[/tex]` and decrements down to 1. `LEN(B[tex]$)` calculates the number of characters in `B$[/tex]`.
4. Reverse the String:
```plaintext
C\[tex]$=C\$[/tex]+MID\[tex]$(B\$[/tex], 1,1)
```
The `MID[tex]
Sagot :
function typically extracts a substring from the string `B$[/tex]`. Here it extracts one character from position `1` of `B[tex]Sagot :
, which seems a bit unusual. Normally, it should extract characters one by one from the end of the string to the beginning. But given that `MID$[/tex](B[tex]$, 1,1)` is used inside the loop controlled by `I`, this suggests the intention to concatenate characters in reverse order. 5. End of Loop: ```plaintext NEXT I ``` This marks the end of the loop; it will continue until `I` reaches `1`. 6. Print Reversed String: ```plaintext PRINT "The required output $[/tex]=[tex]$ ";C\$[/tex]```
After the loop completes, it prints the concatenated string, which should be the reverse of the original input string.
7. End Program:
```
END
```
This indicates the end of the program execution.
### Analysis and Main Purpose:
The purpose of the given program is to reverse the string entered by the user and then display the reversed string.
### Step-by-Step Operation:
1. User is prompted to enter a string `B[tex]
Sagot :
. 2. The loop starts from the end of the string (i.e., character at `LEN(B$[/tex])`) and goes backward to the first character.3. During each iteration, the current character (extracted using `MID[tex]$(B$[/tex], 1,1)`) is appended to the new string `C[tex]
Sagot :
in reverse order. 4. The loop continues until all characters have been processed in reverse order. 5. The final reversed string in `C$[/tex]` is printed as output.### Final Answer:
a. The main purpose of the given program is to reverse a string entered by the user.
