add arraysum

Author: munna9925

README.md

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+### Simple JavaScript Problem solving

arraySum.js

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+function getArraySum(numbers) {
+    let sum = 0;
+    for (let i = 0; i < numbers.length; i++) {
+        const element = numbers[i];
+        sum = sum + element;
+    }
+    return sum;
+}
+const numbers = [1, 2, 3, 6, 5, 5, 4, 2 ]
+const result = getArraySum(numbers);
+console.log(result);
+//expected output: 28