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Assets/Lectures/RL1.md

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+# 20CYS312 - Principles of Programming Languages
+![](https://img.shields.io/badge/Batch-21CYS-lightgreen) ![](https://img.shields.io/badge/UG-blue) ![](https://img.shields.io/badge/Subject-PPL-blue) <br/>
+![](https://img.shields.io/badge/Lecture-2-orange) ![](https://img.shields.io/badge/Practical-3-orange) ![](https://img.shields.io/badge/Credits-3-orange)
+
+## Lecture 1 - Introducton to Rust Programming
+![](https://img.shields.io/badge/-1st_Apr-orange)
+
+
+### Hello World Program
+
+```
+fn main() {
+    println!("Hello, world!");
+}
+```
+
+### Example 1 
+```
+use std::io;
+
+fn main() {
+    println!("Guess the number!"); // Macro call
+
+    println!("Please input your guess.");
+
+    let mut guess = String::new(); // Mutable Var.
+
+    io::stdin() // instance 
+        .read_line(&mut guess) // Ok / Err 
+        .expect("Failed to read line");
+
+    println!("You guessed: {guess}");
+	
+}
+```