Loop Patterns

016_loop_patterns.cell

// ============================================================================
// 016 — Loop Patterns
// ============================================================================
// Common loop patterns: accumulator, find, early exit simulation.
//
// Run:   soma run 016_loop_patterns.cell run
// Expect:
//   Sum: 55
//   Product: 120
//   Max: 42
//   Found Alice at index: 1

cell Patterns {

    on run() {
        // Pattern 1: Accumulator — sum all values
        let nums = list(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
        let sum = 0
        for n in nums {
            sum = sum + n
        }
        print("Sum: {sum}")

        // Pattern 2: Product accumulator
        let factors = list(1, 2, 3, 4, 5)
        let product = 1
        for f in factors {
            product = product * f
        }
        print("Product: {product}")

        // Pattern 3: Find maximum
        let values = list(17, 42, 8, 23, 31)
        let max_val = 0
        for v in values {
            if v > max_val {
                max_val = v
            }
        }
        print("Max: {max_val}")

        // Pattern 4: Linear search with index
        let names = list("Bob", "Alice", "Carol")
        let target = "Alice"
        let found_idx = -1
        let idx = 0
        for name in names {
            if name == target {
                found_idx = idx
            }
            idx = idx + 1
        }
        print("Found {target} at index: {found_idx}")

        return "done"
    }
}