Solidity : Non-strict comparison with zero

Overview

Variables of uint type cannot be negative. Thus, comparing uint variable with zero (greater than or equal) is redundant. Also, it may lead to an underflow issue. Moreover, comparison with zero used in for-loop condition results in an infinite loop.

References

Overflow and Underflow in Solidity

MEDIUM

Solidity : Non-strict comparison with zero

Overview

References

DerScanner Severity Score

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See also

Solidity : Return value of transfer, transferFrom, or approve function of ERC-20 standard is always false.

Solidity : Using approve function of the ERC-20 token standard

Solidity : ERC-20 transfer should throw