# Logic functions¶

## Truth value testing¶

 `all`(a[, axis, out, keepdims]) Test whether all array elements along a given axis evaluate to True. `any`(a[, axis, out, keepdims]) Test whether any array element along a given axis evaluates to True.

## Array contents¶

 `isfinite`(x, /[, out, where, casting, order, ...]) Test element-wise for finiteness (not infinity or not Not a Number). `isinf`(x, /[, out, where, casting, order, ...]) Test element-wise for positive or negative infinity. `isnan`(x, /[, out, where, casting, order, ...]) Test element-wise for NaN and return result as a boolean array. `isneginf`(x[, out]) Test element-wise for negative infinity, return result as bool array. `isposinf`(x[, out]) Test element-wise for positive infinity, return result as bool array.

## Array type testing¶

 `iscomplex`(x) Returns a bool array, where True if input element is complex. `iscomplexobj`(x) Check for a complex type or an array of complex numbers. `isfortran`(a) Returns True if the array is Fortran contiguous but not C contiguous. `isreal`(x) Returns a bool array, where True if input element is real. `isrealobj`(x) Return True if x is a not complex type or an array of complex numbers. `isscalar`(num) Returns True if the type of num is a scalar type.

## Logical operations¶

 `logical_and`(x1, x2, /[, out, where, ...]) Compute the truth value of x1 AND x2 element-wise. `logical_or`(x1, x2, /[, out, where, casting, ...]) Compute the truth value of x1 OR x2 element-wise. `logical_not`(x, /[, out, where, casting, ...]) Compute the truth value of NOT x element-wise. `logical_xor`(x1, x2, /[, out, where, ...]) Compute the truth value of x1 XOR x2, element-wise.

## Comparison¶

 `allclose`(a, b[, rtol, atol, equal_nan]) Returns True if two arrays are element-wise equal within a tolerance. `isclose`(a, b[, rtol, atol, equal_nan]) Returns a boolean array where two arrays are element-wise equal within a tolerance. `array_equal`(a1, a2) True if two arrays have the same shape and elements, False otherwise. `array_equiv`(a1, a2) Returns True if input arrays are shape consistent and all elements equal.
 `greater`(x1, x2, /[, out, where, casting, ...]) Return the truth value of (x1 > x2) element-wise. `greater_equal`(x1, x2, /[, out, where, ...]) Return the truth value of (x1 >= x2) element-wise. `less`(x1, x2, /[, out, where, casting, ...]) Return the truth value of (x1 < x2) element-wise. `less_equal`(x1, x2, /[, out, where, casting, ...]) Return the truth value of (x1 =< x2) element-wise. `equal`(x1, x2, /[, out, where, casting, ...]) Return (x1 == x2) element-wise. `not_equal`(x1, x2, /[, out, where, casting, ...]) Return (x1 != x2) element-wise.