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# Julia | checkbounds() function with examples

• Last Updated : 06 Mar, 2020

The `checkbounds()` is an inbuilt function in julia which is used to return true if the given index value lies within the bounds of the given array, otherwise returns false.

Syntax: checkbounds(Bool, Array, Index)

Parameters: This function accepts three parameters which are illustrated below:-

• Bool: This says that this function will return boolean values as output.
• Array: It is the given array with bounds
• Index: It is the index value which is going to be calculated either it lies in the array bounds or not.

Returns: It returns the value true if the index value lies in the array bounds else false.

Below are some codes which illustrate the above function:
Example #1:

 `# Julia Program for illustration of``# checkbounds() function`` ` `# Initializing an array from 1 to 10``A ``=` `rand(``1``, ``10``);`` ` `# Initializing a index value of 5``Index ``=` `5`` ` `# Calling the checkbounds() function``A ``=` `checkbounds(``Bool``, A, Index)`` ` `# Getting the value true or false``println(A)`

Output:

```true
```

Example #2:

 `# Julia Program for illustration of``# checkbounds() function`` ` `# Initializing a range from 1 to 10``A ``=` `rand(``1``, ``10``);`` ` `# Initializing a index value of 15``Index ``=` `15`` ` `# Calling the checkbounds() function``A ``=` `checkbounds(``Bool``, A, Index)`` ` `# Getting the value true or false``println(A)`

Output:

```false
```

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