There is no need to initialize variables to their default values
DSCEngine.sol lines 118, 353 initialise uint256 i=0 when i will be default value 0 at the start of each loop iteration
Gas Savings: Not much but this initialization adds more operations that are unnecessary increasing costs
Manual Analysis
DSCEngine.sol line 118 change to for (uint256 i; ....etc ) {
DSCEngine.sol line 353 change to for (uint256 i; ....etc) {
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