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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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