name: duk_get_number

proto: |
  duk_double_t duk_get_number(duk_context *ctx, duk_idx_t idx);

stack: |
  [ ... val! ... ]

summary: |
  <p>Get the number value at <code>idx</code> without modifying or coercing
  the value.  Returns <code>NaN</code> if the value is not a number or the
  index is invalid.</p>

example: |
  printf("value: %lf\n", (double) duk_get_number(ctx, -3));

introduced: 1.0.0