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rohitisog · Sep 19, 2022 · 688680f · 688680f
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diff --git a/07Day-WhileLoop.sol b/07Day-WhileLoop.sol
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+// SPDX-License-Identifier: aIT
+pragma solidity >=0.5.0 <0.9.0;
+
+contract day1 {
+//Create a function digitSum(int n). Where n>0.
+    function digitSum(int256 n) public pure returns (int256) {
+        int256 a;
+        int256 sum = 0;
+        while (n > 0) {
+            a = n % 10;
+            sum = sum + a;
+            n = n / 10;
+        }
+        //Return the sum of digit for n.
+        return sum;
+    }
+}