36.mdx

fork	group
Frontier	Environmental Information

Index 1 is top of the stack. See PUSH.

Stack output

0. size: byte size of the calldata.

Example

Calldata
0xFF

*	Input	Output
1		1

Reproduce in playground.

Error cases

The state changes done by the current context are reverted in those cases:

• Not enough gas.
• Stack overflow.