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C

difftime()


This function is used to get the difference between two given times

Syntax:
double difftime(time_t time1, time_t time2)


Example:

#include 
#include 
 int main()
 {
    time_t begin,end;
    long i;
    begin= time(NULL);
    for(i = 0; i < 150000000; i++);
    end = time(null);
    printf("for loop used %f seconds to complete the " \
           "execution\n", difftime(end, begin));
    return 0;
}
output:

for loop used 15.000000 seconds to complete the execution


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