Inserts string variable String into a Y-Var. Any variables within String will be kept as-is (i.e., not simplified to their values).
In the catalog
This program will set Y₁ to 5X+3.
This function can also be used to convert a string to a number.
This program will input a number (or a variable) into Str1, convert it to an integer using String▶Equ(, store that number as A, then display A times 5.