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foreach is a looping statement :

• repeats a group of statements for each element in an array or an object collection. (or)
• used to iterate through the collection/ an array to get the required information.

Advantages:

• Easy implementation.
• Least possibility of errors. [ especially when working with index based values, like in arrays. ]

Syntax:

foreach(<datatype of collection / array> <variablename> <in> <collection/array>)
{

code....

}

Example:

foreach(string courseName in coursesList)
{

code....

}

• here, coursesList is a string collection
• string courseName is called as the "loop variable" which represents the element from the collection in each iteration.
• in is the pre-defined keyword

Working style of foreach loop:

• data type of loop variable must and should be the same as the data type of the array/collection that has to be referred.
• At the time of execution, first the foreach loop goes to the array/collection, counts the number of elements & repeats the loop that many times automatically.
• At each iteration array/collection location value will be copied into loop variable.

Example 1: In the below example, we'll see how to iterate a group of int type array elements using foreach loop.

Example 2: In the below example, we'll see how to iterate a group of values in a collection.

NOTE : in .NET we've different types of collections. For example we took "List" a generic collection

foreach is a looping statement :

• repeats a group of statements for each element in an array or an object collection. (or)
• used to iterate through the collection/ an array to get the required information.

Advantages:

• Easy implementation.
• Least possibility of errors. [ especially when working with index based values, like in arrays. ]

Syntax:

foreach(<datatype of collection / array> <variablename> <in> <collection/array>)
{

code....

}

Example:

foreach(string courseName in coursesList)
{

code....

}

• here, coursesList is a string collection
• string courseName is called as the "loop variable" which represents the element from the collection in each iteration.
• in is the pre-defined keyword

Working style of foreach loop:

• data type of loop variable must and should be the same as the data type of the array/collection that has to be referred.
• At the time of execution, first the foreach loop goes to the array/collection, counts the number of elements & repeats the loop that many times automatically.
• At each iteration array/collection location value will be copied into loop variable.

Example 1: In the below example, we'll see how to iterate a group of int type array elements using foreach loop.

Example 2: In the below example, we'll see how to iterate a group of values in a collection.

NOTE : in .NET we've different types of collections. For example we took "List" a generic collection