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CompareZero.md

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Comparision for Zero

The operation != 0 costs less gas compared to > 0 for unsigned integers outside of require statements. But > 0 is cheaper than != in a require statement.

When dealing with unsigned integer types, comparisons with != 0 are cheaper than those with > 0.

Preview

Testing on the CompareZero.t.sol file,

    Running 4 tests for test/CompareZero.t.sol:CompareZeroTest
    [PASS] testGeneralRequire() (gas: 5408)
    [PASS] testOptimalRequire() (gas: 5396)

    [PASS] testGeneralReturn() (gas: 5491)
    [PASS] testOptimalReturn() (gas: 5457)
    Test result: ok. 4 passed; 0 failed; finished in 800.41µs

Guidelines

Use > 0 or != 0 operators as per the logical design of the code.