For Loop in Solidity

The for loop is the most compact kind of loop available. It is comprised of the three essential components listed below:

• Our counter is initially set to a starting value during the loop startup process. The initialization statement is executed before the start of the loop's execution.

• The test statement is used to determine whether a particular condition is true or false. If the condition is met, the code contained within the loop will be performed; if it is not, the control will be released from the loop.

• The iteration statement is where you can change the value of your counter by increasing or decreasing it.

You can put all three pieces on a single line and split them with a semicolon if you want.

Syntax

for (initialization; test condition; iteration statement) {
   Statement(s) to be executed if test condition is true
}

For loop examples

Example 1

pragma solidity ^0.8.0; 

// Creating a contract
contract Types { 

    // Declaring a dynamic array 
    uint[] data; 

    // Defining a function 
    // to demonstrate 'For loop'
    function loop(
    ) public returns(uint[] memory){
    for(uint i=0; i<5; i++){
        data.push(i);
     }
      return data;
    }
}

Example 2

pragma solidity ^0.8.0;

contract SolidityTest {
   uint storedData=10; 

   function getResult() public returns(string memory){
      uint a = 10; 
      uint b = 2;
      uint result = a + b;
      return integerToString(result); 
   }

   function integerToString(uint i)public returns (string memory) {
      if (i == 0) {
         return "0";
      }
      uint j=0;
      uint len;
      for (j = i; j != 0; j /= 10) {  //for loop example
         len++;         
      }
      bytes memory bstr = new bytes(len);
      uint k = len - 1;
      while (i != 0) {
         bstr[k--] = byte(uint8(48 + i % 10));
         i /= 10;
      }
      return string(bstr);//access local variable
   }
}

For more content, follow me on - https://linktr.ee/shlokkumar2303