Course of Raku / Essentials / Conditional checks / Exercises / How many numbers are equal?

# Solution: How many numbers are equal?

The program should make a few comparisons. For three input numbers, there are two possible cases:

- All three numbers are equal,
- Only two numbers are equal, and
- All numbers are different.

## Code

Here is the solution with explicit comparisons.

```
my $n1 = prompt 'Enter number 1: ';
my $n2 = prompt 'Enter number 2: ';
my $n3 = prompt 'Enter number 3: ';
if $n1 == $n2 == $n3 {
say 3;
}
elsif $n1 == $n2 || $n2 == $n3 || $n1 == $n3 {
say 2;
}
else {
say 0;
}
```

🦋 Find the program in the file how-many-equal-numbers.raku.

## Output

```
$ raku exercises/conditional-checks/how-many-equal-numbers.raku 0 0 0
Enter number 1: 14
Enter number 2: 8
Enter number 3: 8
2
$ raku exercises/conditional-checks/how-many-equal-numbers.raku
Enter number 1: 15
Enter number 2: 15
Enter number 3: 15
3
$ raku exercises/conditional-checks/how-many-equal-numbers.raku
Enter number 1: 4
Enter number 2: 6
Enter number 3: 8
0
```

## Comments

- Note that you can compare three numbers in a single expression:
`$n1 == $n2 == $n3`

. - Return to this task and solve it again after learning about the reduction operator.

## Next exercise

## Course navigation

← Code blocks / Local variables | Loops →