Check input data type

Conditional statements make your code intelligent so that it can respond to your inputs or to the results it calculates.

One common use for conditional statements is to respond to the users' inputs. In this example, let's say you have written some code for an online shop that will return a number n of this week's top-rated products. This code only works if the input n is an integer (a whole number). You want to check if n is suitable and print a message to help the user.

The input n has already been assigned and is available in your environment.

This exercise is part of the course

Introduction to Julia

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Exercise instructions

Write an if statement to check whether the type of parameter n is equal to Int64.
If it is this type, print the statement "n is the correct type".
Write an else block so that the message "This script only works on integers" is printed otherwise.
End the conditional statement.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# Check if n is the correct type
if ____==____
	# Print n is the correct type
	println(____)
# Use an else statement to print if n is not the correct type
____
	____(____)
# Finish the conditional statement
____

println(n)

Edit and Run Code