BCPOWMOD(3) 1 BCPOWMOD(3)bcpowmod - Raise an arbitrary precision number to another, reduced by a specified modulusSYNOPSIS
string bcpowmod (string $left_operand, string $right_operand, string $modulus, [int $scale = int])
DESCRIPTION
Use the fast-exponentiation method to raise $left_operand to the power $right_operand with respect to the modulus $modulus.
PARAMETERS
o $left_operand
- The left operand, as a string.
o $right_operand
- The right operand, as a string.
o $modulus
- The modulus, as a string.
o $
scale -This optional parameter is used to set the number of digits after the decimal place in the result. You can also set the
global default scale for all functions by using bcscale(3).
RETURN VALUES
Returns the result as a string, or NULL if $modulus is 0.
NOTES
Note
Because this method uses the modulus operation, numbers which are not positive integers may give unexpected results.
EXAMPLES
The following two statements are functionally identical. The bcpowmod(3) version however, executes in less time and can accept larger
parameters.
<?php
$a = bcpowmod($x, $y, $mod);
$b = bcmod(bcpow($x, $y), $mod);
// $a and $b are equal to each other.
?>
SEE ALSO bcpow(3), bcmod(3).
PHP Documentation Group BCPOWMOD(3)
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BCPOW(3) 1 BCPOW(3)bcpow - Raise an arbitrary precision number to anotherSYNOPSIS
string bcpow (string $left_operand, string $right_operand, [int $scale])
DESCRIPTION
Raise $left_operand to the power $right_operand.
PARAMETERS
o $left_operand
- The left operand, as a string.
o $right_operand
- The right operand, as a string.
o $
scale -This optional parameter is used to set the number of digits after the decimal place in the result. You can also set the
global default scale for all functions by using bcscale(3).
RETURN VALUES
Returns the result as a string.
EXAMPLES
Example #1
bcpow(3) example
<?php
echo bcpow('4.2', '3', 2); // 74.08
?>
NOTES
Note
bcpow(3) may return a result with fewer digits after the decimal point than the $scale parameter would indicate. This only occurs
when the result doesn't require all of the precision allowed by the $scale. For example:
Example #2
bcpow(3) scale example
<?php
echo bcpow('5', '2', 2); // prints "25", not "25.00"
?>
SEE ALSO bcpowmod(3), bcsqrt(3).
PHP Documentation Group BCPOW(3)
Hi ,
this is the first time i use bc to calculate and i would have decimal result , i use the following :
toto=400;scale=1 echo $toto / 1000|bc
scale to adjust the numbers after the command would have in this case 0.4 as result and i wonder why i have always 0 as result.
Somebody can... (2 Replies)
Hi,
I would like to know given that i have two columns and I would like to take the positive integer of the differences between the two columns.
which means |3-2|=1; |2-3|=1 as well.
I would like to know do Bash recognize | | as well for this purposes?
Thanks.
-Jason (2 Replies)
Hi,
I am trying to calculate inverse modulus of a mod n ie.,
a ^ -1 mod n.
Is there a function in Perl that does this for me. If not, can someone help me with the code?
Thanks in advance.
Thanks,
Sundeep. (0 Replies)
I need to read the file divide 3 column with 2nd and run a modulus of 10 and check whether the remainder is zero or not if not print the entire line.
cat filename | awk '{ if ($3 / $2 % 10 != 0) print $0}'
Whats wrong with it ? (4 Replies)
Hello All,
I am trying to do a simple calculation using modulus (%) as shown below. But some how it is not showing me correct result. It says "0.166667" is equal to "0" which is wrong. Could you please help me how can i make it work. Thanks a lot.
#!/bin/ksh
attempt_count=10
SLEEP=60... (7 Replies)
Hello, pro scripters, noob here,
I am complete noob in this and I have to write a program which:
Calculates the modulus of two numbers which the user enters with keyboard. Number interval 1-9. These two numbers that were entered and modulus which was calculated are stored in a separate file.... (1 Reply)