How can find exiting value in array with example using python

 To find an existing value in an array, you typically iterate through the array and compare each element to the target value. If you find a match, you can return its index or the value itself. Here’s a simple example in Python to illustrate this:

python code

def find_value(array, target):

    for index, value in enumerate(array):

        if value == target:

            return index # Return the index of the found value

    return -1 # Return -1 if the value is not found

# Example usage

array = [10, 20, 30, 40, 50]

target = 30

index = find_value(array, target)

if index != -1:

    print(f"Value {target} found at index {index}")

else:

    print(f"Value {target} not found in the array")

In this example:

We define a function find_value that takes an array and a target value.

We use a for loop to iterate over the array with enumerate to get both the index and value.

If the value matches the target, the function returns the index of that value.

If the loop completes without finding the target, the function returns -1.

This approach works for arrays (or lists) in most programming languages.