{"id":9617,"date":"2022-05-13T11:25:16","date_gmt":"2022-05-13T11:25:16","guid":{"rendered":"http:\/\/fastbitlab.com\/?p=9617"},"modified":"2023-08-28T10:34:49","modified_gmt":"2023-08-28T05:04:49","slug":"microcontroller-embedded-c-programming-lecture-34-summary-of-local-and-global-variables","status":"publish","type":"post","link":"https:\/\/fastbitlab.com\/blog\/microcontroller-embedded-c-programming-lecture-34-summary-of-local-and-global-variables\/","title":{"rendered":"Microcontroller Embedded C Programming Lecture 34| Summary of local and global variables"},"content":{"rendered":"
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Summary of local and global variables<\/span><\/strong><\/h1>\n
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In the previous article<\/a><\/span>, we discussed the variable scopes. Let’s see the Summary of local and global variables.<\/span><\/p>\n

Local and global variables are concepts in programming that refer to the scope and accessibility of variables within a program. They determine where a variable can be accessed and modified, as well as its lifetime.<\/p>\n

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Global Variables<\/span><\/strong><\/span><\/p>\n

Scope<\/b><\/em><\/span>\u2192 Global variables are visible to all the functions of a program. They are everywhere. Even you can access global variables from another file of the project. <\/span><\/span><\/p>\n

Default value<\/b><\/em><\/span>\u2192<\/span> All uninitialized global variables will have 0 as the default value.<\/span><\/span><\/p>\n

Lifetime<\/b><\/em><\/span>\u2192<\/span> The lifetime of these variables is till the end of the execution of the program. <\/span><\/span><\/p>\n