c - Why does this print 1? -

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#include <stdio.h>   int main()  {    int var=0;    for(; var++; printf("%d",var));      printf("%d", var);  }

please explain me c code. how output 1?

you might confused because of wrong code indentation. code is:

for(; var++; printf("%d",var))     ;  printf("%d", var);

so output of second printf. var initialized 0 , var++ (the for-condition) executed, end var==1.


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