test2

exercises/variables/README.md

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+# Variables
+
+In Rust, variables are immutable by default.
+When a variable is immutable, once a value is bound to a name, you can’t change that value.
+You can make them mutable by adding mut in front of the variable name.
+
+## Further information
+
+- [Variables and Mutability](https://doc.rust-lang.org/book/ch03-01-variables-and-mutability.html)

exercises/variables/variables1.rs

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+// variables1.rs
+// Make me compile! Execute the command `rustlings hint variables1` if you want a hint :)
+
+// About this `I AM NOT DONE` thing:
+// We sometimes encourage you to keep trying things on a given exercise,
+// even after you already figured it out. If you got everything working and
+// feel ready for the next exercise, remove the `I AM NOT DONE` comment below.
+
+// I AM NOT DONE
+
+fn main() {
+    let x = 5;
+    println!("x has the value {}", x);
+}

exercises/variables/variables2.rs

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+// variables2.rs
+// Make me compile! Execute the command `rustlings hint variables2` if you want a hint :)
+
+// I AM NOT DONE
+
+fn main() {
+    let x;
+    x=9;
+    if x == 10 {
+        println!("Ten!");
+    } else {
+        println!("Not ten!");
+    }
+}

exercises/variables/variables3.rs

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+// variables3.rs
+// Make me compile! Execute the command `rustlings hint variables3` if you want a hint :)
+
+// I AM NOT DONE
+
+fn main() {
+    let x = 3;
+    println!("Number {}", x);
+    x = 5; // don't change this line
+    println!("Number {}", x);
+}

exercises/variables/variables4.rs

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+// variables4.rs
+// Make me compile! Execute the command `rustlings hint variables4` if you want a hint :)
+
+// I AM NOT DONE
+
+fn main() {
+    let x: i32;
+    println!("Number {}", x);
+}

exercises/variables/variables5.rs

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+// variables5.rs
+// Make me compile! Execute the command `rustlings hint variables5` if you want a hint :)
+
+// I AM NOT DONE
+
+fn main() {
+    let number = "T-H-R-E-E"; // don't change this line
+    println!("Spell a Number : {}", number);
+    number = 3;
+    println!("Number plus two is : {}", number + 2);
+}

exercises/variables/variables6.rs

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+// variables6.rs
+// Make me compile! Execute the command `rustlings hint variables6` if you want a hint :)
+
+// I AM NOT DONE
+
+const NUMBER = 3;
+fn main() {
+    println!("Number {}", NUMBER);
+}