Update 2024-01-04-lesson4.md

Author: stream-rahul

_posts/2024-01-04-lesson4.md

@@ -142,25 +142,10 @@ fn main() {
 } // (39) `main` function end. Program execution ends after `main`.
 
 
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 ```
 
 ## C Implementation
 
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 ```c
 // C implementation will be added here
 
@@ -351,14 +336,6 @@ int main(int argc, char* argv[]) {
 
 ```
 
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 ### Exercise
 
-Let us implement this in C++23 or C++20 
+Let us implement this in C++23 or C++20