name: duk_require_int

proto: |
  duk_int_t duk_require_int(duk_context *ctx, duk_idx_t idx);

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

summary: |
  <p>Like <code><a href="#duk_get_int">duk_get_int()</a></code>,
  but throws an error if the value at <code>idx</code> is not a number
  or if the index is invalid.</p>

  <!--
  <p>The number is coerced as for <code><a href="#duk_get_int">duk_get_int()</a></code>
  with only numeric inputs allowed.</p>
  -->

example: |
  printf("int value: %ld\n", (long) duk_require_int(ctx, -3));

tags:
  - stack

introduced: 1.0.0