A local variable is initialized each time its block is entered : function scope variables « Function « C++ Tutorial

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C++ Tutorial » Function » function scope variables 
7.15.2.A local variable is initialized each time its block is entered
#include <iostream> 
using namespace std; 
 
void f()
 
int main() 

   
  for(int i=0; i < 3; i++f()
   
  return 0

 
// num is initialized each time f() is called. 
void f() 

  int num = 99
 
  cout << num << "\n"
 
  num++; // this has no lasting effect 
}
99
99
99
7.15.function scope variables
7.15.1.Function level variable
7.15.2.A local variable is initialized each time its block is entered
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