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what is the default value of key in map in cpp

Concerned Cheetah answered on August 7, 2022 Popularity 8/10 Helpfulness 2/10

answer what is the default value of key in map in cpp

what is the default value of key in map in cpp

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̌A map is a container which is used to store a key-value pair.
By default, In Primitive datatypes such as int, char, bool, float 
in C/C++ are undefined if variables are not initialized.
But a Map is initially empty when it is declared. 
  

When this map is accessed with the [ ] (e.g map<int,int> mpp;  mpp[1]; )
if the key is not present in the map , it gets added and 
its value is by default set to 0 (i.e value initialization 
gets invoked for the int)

Popularity 8/10 Helpfulness 2/10 Language cpp

Source: Grepper

Tags: c++ key map

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Contributed on Aug 07 2022

Concerned Cheetah

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what is the default value of key in map in cpp

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