In this post, we will understand the Operators: Arithmetic, Logical & Bitwise Operators in Solidity Language.
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pragma solidity 0.4.8;
/*
* @title Learn Solidity: Operators: Arithmetic, Logical & Bitwise Operators
* @author Toshendra Sharma
* @notice Example for the Learn Solidity Series
*/
// Operators are most common things in any programming language
// lets checkout the different types of perators in solidity
contract Operators {
// Arithmatic Operators
uint a = 10;
// +, -, unary -, unary +, *, /, % (remainder), ** (exponentiation)
uint b = 2**3; // b = 8
// a++ and a-- are equivalent to a += 1 / a -= 1
// but the expression itself still has the previous value of a.
// In contrast, --a and ++a have the same effect on a but return the value after the change.
a = a++; // a = 10
a = ++a; // a = 11
// a += e is equivalent to a = a + e.
// The operators -=, *=, /=, %=, a |=, &= and ^= are defined accordingly.
a += 5; // a = 11+5 = 16
// Logical Operators
// ! (logical negation)
// && (logical conjunction, “and”)
// || (logical disjunction, “or”)
// == (equality)
// != (inequality)
bool isOwner;
isOwner = isMortal && hasWriteAccess;
isOwner = true && false; // false
isOwner = true || false; // true
isOwner = !false; // true
var check = (1 ether == 1000 finney); // true
var check = (1 ether != 2000 finney); // true
// Bitwise Operators
// & Bitwise AND
// | Bitwise OR
// ^ Bitwise exclusive OR
// ~ Bbitwise negation
// >> Bitwise right shift
// << Bitwise left shift
var orValue = 0x02 | 0x01; // orValue = 0x03
uint shiftValue = 0x01 << 2; // shiftValue = 4
// Define consutruct here
function Operators(uint initialCoins) {
// Initialize state variables here
}
}
