Electronic device and method for executing designated function according to contact of external object

An electronic device comprising:

• a housing;
• a plurality of key buttons protruded from an exterior surface of the housing to be exposed to outside of the electronic device;
• a grip sensor;
• memory comprising one or more storage media storing instructions;
• and
• at least one processor comprising processing circuitry, wherein the instructions, when executed by the at least one processor individually or collectively, cause the electronic device to:
• identify, via the grip sensor, whether that an external object is contacted on at least a portion of the exterior surface;
• receive an input with respect to a first key button from among the key buttons;
• based on the input being received while an external object is identified via the grip sensor as contacted on at least the portion of the exterior surface, execute a first function assigned to the first key button;
• and
• based on the input being received while an external object is identified via the grip sensor as not contacted on at least the portion of the exterior surface, execute a second function assigned to a combination of the first key button and a second key button from key buttons.