Command to find out ram size on Linux/Unix?

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Question from ssnkumar "Is there any command in Unix/Linux to find out how much ram is there in my comp?

I know that top gives the ram size also. But, I want a command which gives out only ram size?"

Answer from arb123 "cat /proc/meminfo"

Answer from evers310 "cat /proc/meminfo | grep MemTotal"