Understande the difference between prefix and postfix operators in Solidity

Postfix operators

uint8 i;            // 0
emit log_uint(i++); // 0
emit log_uint(i);   // 1

int8 i;             // 0
emit log_int(i--);  // 0
emit log_int(i);    // -1

When the value is modified by the postfix operator the value of the expression is equal to the unmodified/old value.

Prefix operators

uint8 i;            // 0
emit log_uint(++i); // 1
emit log_uint(i);   // 1

int8 i;             // 0
emit log_int(--i);  // -1
emit log_int(i);    // -1

When the value is modified by the prefix operator the value of this expression is equal to the modified/new value.

Reference

• Docs

Join the garden

Finally enjoy quality-first content.

'cause low-quality sucks