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The "constant" function is most popular function to create tensors. The only required argument is value or list of values used to create tensor.The default data type is float32 is list of values are of floating type and int32 if values are integer type.
In TensorFlow, we can create variables by calling tf.Variable, the first parameter sets the variable's initial value and second optional parameter defines the name of variable. TensorFlow have global_variables_initializer() functions that create operations which initialize variables.
In order to update, increment and decrements the value of a variable, we use Variable.assign(), Variable.assign_add() and Variable.assign_sub() methods respectively.