ConstantArray

ConstantArray[ s,n ]

ConstantArray[ s,n ] creates a list with n copies of the element s.

Example in out
The list with 5 copies of the number 2. ConstantArray[ 2,5 ] {2,2,2,2,2}
The list with 3 copies of the expression sqrt[2]. ConstantArray[ sqrt[2],3 ] { sqrt[2], sqrt[2], sqrt[2] }
The list with n copies of x, where n is defined as 5 and x is undefined in the script. ConstantArray[x,n] {x,x,x,x,x}