Accept a user input in string ( a numerical expression ) and evaluate it's value

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猫巷女王i
猫巷女王i 2020-11-30 03:41

I have a String and I need to evaluate it\'s numerical value Eg. a=\'5.1+2.3-1.9\' Evaluate it\'s value I tried using type conversion but it\'s not working error as Could

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