==== 7.5.45 iinc ====

Increment local int variable by constant 

Format 

iinc 

index 

const 

Forms  

iinc = 90 (0x5a) 

Stack 

No change 

Description 

The index is an unsigned byte. Both index and index + 1 must be valid indices into the local variables of the current frame ([[3.5_Frames| Section 3.5, Frames]]). The local variables at index and index + 1 together must contain an int. The const is an immediate signed byte. The value const is first sign-extended to an int, then the int contained in the local variables at index and index + 1 is incremented by that amount. 

Notes 

If a virtual machine does not support the int data type, the iinc instruction will not be available.