dc command in Linux is used to evaluate arithmetic expressions. It evaluates expressions in the form of a postfix expression. Entering a number pushes it into the stack and entering an operator evaluates an expression and pushes the result back into the stack. It can evalute +, -, /, *, %, ^. Different commands can be used to manipulate stack.
dc [OPTION] [file ...]
Below table illustrate the different commands and their explanation:
|p||Prints the value on the top of the stack and ends the statement with a newline.|
|n||Prints the value on the top of the stack and ends the line with a null statement.|
|f||Prints the entire stack, without any alteration.|
|P||Pops the value from the top of the stack.|
|c||Clear the stack.|
|d||Duplicates the top value and push it into the main stack.|
|r||Reverses the order of top two elements in the stack.|
|Z||Pops the value from the stack, calculate the number of digits in it and pushes that number.|
|X||Pops the value from the stack, calculate the number of fraction digits in it and pushes that number.|
|z||Pushes the stack length into the stack.|
|i||Pops the value from the stack and uses it as input radix.|
|o||Pops the value from the stack and uses it as output radix.|
|k||Pops the values from the stack and uses it to set precision.|
|I||Pushes the value of input radix into the stack.|
|O||Pushes the value of output radix into tje stack|
|K||Pushes the precission value into the stack.|
Note: In second example, the output changes because we changed the output-radix.
- expression : This command is used to evaluate a particular expression.
- file : This command is used to evalute the contents of the file.
- help : This command displays help information.
- version: This command is used to display version information.