Salesforce Apex Loops

Before  Going to Apex Loops  let’s learn about loops .

What Is loops?

Loops are used to execute one or more statement to desired number of times. All Programming languages provides various types of loops . bascially  lopps are used to iterate

Apex Supports Two Types Of loops:

1. While loops
2.  For loops

Apex Loops: Apex supports two types of loops 

To repeatedly execute a block of code while a given condition holds true, use a loop. Apex supports do-while, while, and for loops.

1) While Loops

A do-while loop repeatedly executes a block of code as long as a Boolean condition specified in the whilestatement remains true. Execute the following code:

Integer count = 1;

Do {

System.debug(count);

Count++;

} while (count < 11);

The while loop repeatedly executes a block of code as long as a Boolean condition specified at the beginning remains true.

Integer count = 1;

While (count < 11) {

System.debug(count);

count++;

}

2)For Loops

There are three types of for loops. The first type of for loop is a traditional loop that iterates by setting a variable to a value, checking a condition, and performing some action on the variables.

for (Integer i = 1; i <= 10; i++){

System.debung(i);}

A second type of for loop is available for iterating over a list or a set.

Integer[] myInts =new Integer[] {10,20,30,40,50,60,70,80,90,100};

For (Integer i: myInts) {

System.debug(i);

}

The third type of for loop is SOQL for Loop.

We use SOQL for loops to  iterate over all of the sObject records returned by a SOQL query.

here is the Example :

for (your variable : [soql_query]) {
    code_block
}

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