add prac13 module with loop examples and update Cargo.toml

Author: 0x-Professor

Cargo.toml

@@ -54,4 +54,8 @@ path = "src/prac11.rs"
 name = "prac12"
 path = "src/prac12.rs"
 
+[[bin]]
+name = "prac13"
+path = "src/prac13.rs"
+
 [dependencies]

src/main.rs

@@ -9,6 +9,7 @@ mod prac9;
 mod prac10;
 mod prac11;
 mod prac12;
+mod prac13;
 
 fn main(){
     let string_literal:&str = "Hello, Blockchain!";

src/prac13.rs

@@ -0,0 +1,29 @@
+fn main(){
+    let mut counter:u8 = 0;
+    loop{
+        counter+=1;
+        if counter == 5 {
+            println!("Counter reached 5, exiting loop.");
+            break;
+        }
+    }
+    func_while();
+    func_for();
+}
+fn func_while(){
+    let mut counter:u8 =0;
+    while counter !=5{
+        counter +=1;
+        println!("Counter in while loop: {}", counter);
+    }
+}
+
+fn func_for(){
+    for i in 1..5{
+        println!("Counter in for loop: {}", i);
+    }
+    let arr:[&str;5] = ["Hello", "Blockchain", "Rust", "Programming", "Language"];
+    for element in arr.iter(){
+        println!("Array element: {}", element);
+    }
+}