Create an Expression in R Programming – expression() Function

function in R Language is used to create an expression from the values passed as argument. It creates an object of the expression class.**expression()**

Syntax:expression(character)

Parameters:character:Expression, like calls, symbols, constants

**Example 1:**

`# R program to create an expression` ` ` `# Calling expression() Function` `x <` `-` `expression(` `2` `^ ` `3` `)` `x` ` ` `# Printing value of the expression` `eval` `(x)` |

**Output:**

expression(2^3) [1] 8

**Example 2:**

`# R program to create an expression` ` ` `# Calling expression() Function` `x <` `-` `expression(sin(pi ` `/` `2` `))` `x` ` ` `# Printing value of the expression` `eval` `(x)` ` ` `# Printing class of expression` `class` `(x)` |

**Output:**

expression(sin(pi/2)) [1] 1 [1] "expression"