[example] Simple interest calculation.

examples/interest/.gitignore

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+outputs/
+build/

examples/interest/README.md

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+# interest.aleo
+
+## Build Guide
+
+To compile this Aleo program, run:
+```bash
+aleo build
+```

examples/interest/inputs/interest.in

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+// The program input for interest/src/main.leo
+[main]
+capital: u32 = 80u32;
+rate: u32 = 5u32; // 5%

examples/interest/program.json

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+{
+    "program": "interest.aleo",
+    "version": "0.0.0",
+    "description": "",
+    "development": {
+        "private_key": "APrivateKey1zkp6QSDYHfL4Tr54dKXXxSwZWVpm1Ro3feYgpvAampgNmKu",
+        "address": "aleo1lwxu6nluvjt6hu0gurjsph23wlvyxkut59r757szma2s9mrljggsvue3n4"
+    },
+    "license": "MIT"
+}

examples/interest/src/main.leo

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+// The 'interest' main function.
+function main(capital: u32, public rate: u32) -> u32 {
+    let amount: u32 = capital;
+    for i:u8 in 0u8..10u8 { // accrue for 10 periods
+        amount += amount * rate / 100u32; // round down
+    }
+    return amount;
+}