# 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]) Test element-wise for finiteness (not infinity or not Not a Number). isinf(x[, out]) Test element-wise for positive or negative infinity. isnan(x[, out]) Test element-wise for NaN and return result as a boolean array. isneginf(x[, y]) Test element-wise for negative infinity, return result as bool array. isposinf(x[, y]) 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 array is arranged in Fortran-order in memory 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]) Compute the truth value of x1 AND x2 element-wise. logical_or(x1, x2[, out]) Compute the truth value of x1 OR x2 element-wise. logical_not(x[, out]) Compute the truth value of NOT x element-wise. logical_xor(x1, x2[, out]) Compute the truth value of x1 XOR x2, element-wise.

## Comparison¶

 allclose(a, b[, rtol, atol]) 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]) Return the truth value of (x1 > x2) element-wise. greater_equal(x1, x2[, out]) Return the truth value of (x1 >= x2) element-wise. less(x1, x2[, out]) Return the truth value of (x1 < x2) element-wise. less_equal(x1, x2[, out]) Return the truth value of (x1 =< x2) element-wise. equal(x1, x2[, out]) Return (x1 == x2) element-wise. not_equal(x1, x2[, out]) Return (x1 != x2) element-wise.