If x has the value 5 and you reassign it with xexpr x 10 wh

If x has the value 5, and you reassign it with x=“expr $x + 10”, what is the new value of x? what would have been the value if single quotes had been used? What’s wrong with all of this anyway?

Solution

This is a unix command ,

If x = \'expr $x + 10\' (that means single code, it will take the value of x which is 5 add 10 to it which becomes 15 and assign this to x then x value would become 15 But here it is double quotes which is not a valied syntax , double quotes are used with echo to display the output.