## What is expression tree explain with example?

Expression tree as name suggests is nothing but expressions arranged in a tree-like data structure. For example, an expression tree can be used to represent mathematical formula x < y where x, < and y will be represented as an expression and arranged in the tree like structure.

## What is an expression tree in data structure?

An expression tree is a representation of expressions arranged in a tree-like data structure. In other words, it is a tree with leaves as operands of the expression and nodes contain the operators. Expression trees are mainly used for analyzing, evaluating and modifying expressions, especially complex expressions.

**What is a tree in C programming?**

In programming terminology, a tree is nothing but a non-linear data structure that has multiple nodes, rather than just one like we saw in a linked list, stack, and queue. When we talk about trees in C, we generally refer to a binary tree.

**What is prefix expression?**

Prefix: An expression is called the prefix expression if the operator appears in the expression before the operands. Simply of the form (operand1 operand2 operator). Example : AB+CD-* (Infix : (A+B * (C-D) ) Given a Prefix expression, convert it into a Postfix expression.

### Which tree is used for expression evaluation?

binary tree

A particular form of a binary tree, known as binary expression tree is used to represent expressions. Operands are stored in leaves of a binary expression tree and operators are stored in non-leaf nodes.

### How do you make a prefix expression?

Prefix expression notation requires that all operators precede the two operands that they work on. Postfix, on the other hand, requires that its operators come after the corresponding operands. A few more examples should help to make this a bit clearer (see Table 2). A + B * C would be written as + A * B C in prefix.

**How do you find the prefix of a expression?**

Step 1: Start from the last element of the expression. Step 2: check the current element. Step 2.1: if it is an operand, push it to the stack. Step 2.2: If it is an operator, pop two operands from the stack.