# How to Get the Last Digit of an Integer in PHP?

## Getting the last digit of a PHP integer

In PHP, you can get the last digit of an integer in the following ways:

## Using Modulo Operator

You can use the modulo operator (`%`) to get the last digit of an integer in the following way:

```function lastDigit(int \$num): int
{
return \$num % 10;
}

var_dump(lastDigit(0)); // 0
var_dump(lastDigit(1234)); // 4
var_dump(lastDigit(-1234)); // -4
```

In the example above, the modulo operator (`%`) works by dividing a given number by `10` and returning the remainder. It uses truncated division, and is equivalent to the following:

```function lastDigit(int \$num): int
{
\$quotient = intdiv(\$num, 10);
return (\$num - (10 * \$quotient));
}

var_dump(lastDigit(0)); // 0
var_dump(lastDigit(1234)); // 4
var_dump(lastDigit(-1234)); // -4
```

This works in the following way:

```// num = 1234

// lastDigit = 1234 - (10 * intdiv(1234, 10))
// lastDigit = 1234 - (10 * 123)
// lastDigit = 1234 - 1230
// lastDigit = 4
```

## Converting to String and Returning Last Character

You could do the following:

1. Convert the integer to a string;
2. Get the last character of the string;
3. Convert the string back to integer;
4. Add negative sign to the last digit if integer was negative.
```// PHP 7.1+
function lastDigit(int \$num): int
{
\$numStr = (string) \$num;
\$lastChar = \$numStr[-1];
\$lastDigitUnsigned = (int) \$lastChar;

return (\$num < 0) ? -\$lastDigitUnsigned : \$lastDigitUnsigned;
}

var_dump(lastDigit(0)); // 0
var_dump(lastDigit(1234)); // 4
var_dump(lastDigit(-1234)); // -4
```

To support versions prior to PHP 7.1, you can use `\$numStr[strlen(\$numStr) - 1]` instead of `\$numStr[-1]`.

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