How to use new version of Power operator instead of pow()
in new version of php (5.6)?
Like:
echo pow(2,3);
Why output of this line is 512 not 64?
2 ** 3 ** 2;
Many notations use "^" as a power operator, but in PHP (and other C-based languages) that is actually the XOR operator. You need to use this 'pow' function, there is no power operator.
echo(pow(-2,-3.2));
Exponent Operator (^)
Power (exponent) operatorIt takes in two real numbers as input arguments and returns a single number. The operator that can be used to perform the exponent arithmetic in Python is ** .
There is a sample ** operator in php 5.6 +
$i = 6;
$i **=2; //output 36
$out = $i ** 3 //output 46656
echo 2 ** 3 ** 2; // 512 (not 64) because this line evaluated right to left => 2 ** (3 ** 2)
echo -3 ** 2; // -9 (not 9)
echo 1 - 3 ** 2; // -8
echo ~3 ** 2; // -10 (not 16)
**
is better than pow(,)
.
When you try to write a math algorithm. **
is a Powerful Operator.
there's no functional difference between it and pow.
power operator refrence
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