how to find execution time of while-loop not total program [duplicate]

Question

int i=0; while(i<=100) { printf("hello world....\n"); i++; }

For the above program, how can I find the total time of execution of while loop.

For loop execution while( i <= 100 ). It's already been answered here: stackoverflow.com/questions/5248915/execution-time-of-c-program — Azeem
– Azeem, Commented Jun 16, 2017 at 5:42
Could have searched before asking the question. This has already been answered. — Zeokav
– Zeokav, Commented Jun 16, 2017 at 5:43
That will be executed really, really fast :-) You probably want to change while(i>=100) into while(i <= 100) — 4386427
– 4386427, Commented Jun 16, 2017 at 5:53
thank you frnds. i have searched before but i did'nt find may be I am lack of searching knowledge . anyway thanks. — yoctotutor.com
– yoctotutor.com, Commented Jun 16, 2017 at 5:57

suraj · Accepted Answer · 2017-06-16 06:21:54Z

In header file time.h have that function. you can use that. You can see there is a clock_t variable called start which calls a clock() function. try this:

clock_t start = clock(); for ( i = 0; i < 100; i++ ) rand(); printf ( "%f\n", ( (double)clock() - start ) / CLOCKS_PER_SEC );

it will give you execution time. for this check your conditioj in while loop. it should "< 100" i think. check this code it will work for you.

loop will not execute i=0 and in while loop it says i>=100

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