I'll give you a question, please answer with step-by-step reasoning process.
Passage: The INT 3 instruction is defined for use by debuggers to temporarily replace an instruction in a running program in order to set a breakpoint. Other INT instructions are encoded using two bytes. This makes them unsuitable for use in patching instructions (which can be one byte long); see SIGTRAP.\n\nQuestion: Based on this passage, what is the purpose of int3 in the program?

for use by debuggers to temporarily replace an instruction in a running program in order to set a breakpoint
The important part for answering this question is: The INT 3 instruction is defined for use by debuggers to temporarily replace an instruction in a running program in order to set a breakpoint.

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So, the final answer is for use by debuggers to temporarily replace an instruction in a running program in order to set a breakpoint