Counter

This Solidity contract defines a counter that can be incremented or decremented by anyone.

Solidity Version

 1contract Counter {
 2    int public count = 0;
 3
 4    function increment() public {
 5        count++;
 6    }
 7
 8    function decrement() public {
 9        count--;
10    }
11}

Explanation

This Solidity contract does:

• Declare a count variable readable by anyone initialized at 0
• Define two functions, increment and decrement, that increase and decrease the counter by 1.
• These functions are marked public, meaning anyone can call them

Gno Version

 1package counter
 2
 3var count int64 = 0
 4
 5func Increment(cur realm) {
 6    count++
 7}
 8
 9func Decrement(cur realm) {
10    count--
11}

• We define a global variable count of type int64. Since it is declared at the package level, its value is persistent, just like in Solidity. As it is capitalized, it can be accessed from outside the package (read-only).
• We provide two functions: Increment and Decrement, which modify the counter value using Go-style syntax (count++ and count--). As they are capitalized, they can be called from outside the package.

Live Demo

Counter Value : 0

Increment

Decrement