PYTHON : DATA FILE HANLING

Subtraction: The - operator in Python can be used in both the binary and unary form. The binary form means subtract, returning a result that is the stan-dard arithmetic di erence of its operands: left operand minus right operand. The unary form means negate, returning the negated value as its operand: zero to zero, positive to negative, and negative to positive. Prototype Example - (int,int ... ................
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