# Difference between revisions of "Numeric Answers - PGML"

To use a number as an answer, just put the number in braces after the answer blank:

``` BEGIN_PGML
The value of [: 3 + 5:] is [______]{8}
END_PGML
```

The value can be stored in a variable:

``` \$a = 3; \$b = 5;

BEGIN_PGML
The value of [: [\$a] + [\$b]:] is [______]{\$answer}
END_PGML
```

or it can be an expression producing the value:

``` \$a = 3; \$b = 5;

BEGIN_PGML
The value of [: [\$a] + [\$b]:] is [______]{\$a+\$b}
END_PGML
```

The number can be a MathObject Real or Complex, or Fraction, or other numeric value as well

``` \$a = 3; \$b = 5;

BEGIN_PGML
The value of [: [\$a] + [\$b]:] is [______]{\$answer}
END_PGML
```

It is also possible to put the number (or formula leading to the number) in quotation marks, though this isn't necessary. If you do, however, the correct answer will be shown as the formula you used rather than the numeric value itself.

``` \$a = 3; \$b = 5;
```
``` BEGIN_PGML
The value of [: [\$a] + [\$b]:] is [______]{"\$a + \$b"}
END_PGML
```

will show "3 + 5" as the correct answer, not 8. (Note: this requires a recent version of PGML.pl)