C language - How to write a C program to find the power of 2 in a normal way and in single step?

**GEEK** · 23-01-07, 01:14 PM

How to write a C program to find the power of 2 in a normal way and in single step?

sands7788 · 09-02-08, 09:38 PM

Quote:

Originally Posted by GEEK

How to write a C program to find the power of 2 in a normal way and in single step?

if((n&(n-1))==0)
printf("The number is a power of two");
Eg:
Consider 8
8---> 1000
7---> 0111
8&7-->0000
Therefore 8 is a power of 2!!
Consider 12
12---> 1100
11---> 1011
12&11-->1000
Therefore 12 is not a power of two

query123 · 26-03-08, 05:50 PM

#include<math.h>

pow(2,i); // 2 raise to i......i can have any value

**sk_kireeti** · 27-03-08, 01:30 PM

1<<n;

/* above statement is equal to 2 power n; you can change value of n to any value.
But keep in mind that this statement abilities are restricted by the size of integer.
So you can't try with too big value for n */

Thanks,
Krishna

23-01-07, 01:14 PM	#1 (permalink)
GEEK Moderator Join Date: Nov 2006 Age: 25 Posts: 227 Thanks: 1 Thanked 12 Times in 9 Posts Thanks: 1 Thanked 12 Times in 9 Posts Rep Power: 6	C language - How to write a C program to find the power of 2 in a normal way and in single step? How to write a C program to find the power of 2 in a normal way and in single step?

26-03-08, 05:50 PM	#3 (permalink)
query123 Junior Member Join Date: Apr 2007 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts Thanks: 0 Thanked 0 Times in 0 Posts Rep Power: 2	Re: C language - How to write a C program to find the power of 2 in a normal way and in single step? #include<math.h> pow(2,i); // 2 raise to i......i can have any value

27-03-08, 01:30 PM	#4 (permalink)
sk_kireeti Super Moderator Join Date: Feb 2006 Location: Hyderabad Posts: 2,355 Thanks: 117 Thanked 241 Times in 198 Posts Thanks: 117 Thanked 241 Times in 198 Posts Blog Entries: 4 Rep Power: 51	Re: C language - How to write a C program to find the power of 2 in a normal way and in single step? 1<<n; /* above statement is equal to 2 power n; you can change value of n to any value. But keep in mind that this statement abilities are restricted by the size of integer. So you can't try with too big value for n */ Thanks, Krishna __________________ Give 1 cup rice to a hungry Indian just by a mouse click. No money, no form filling, no hassle... Click here for the donation.

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