I have shown how you can perform math as well as logical operations together.

So first we will create a new windows application and design the below form.


Now use the below code,

  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Threading.Tasks;
  9. using System.Windows.Forms;
  11. namespace Example_of_math_variables_and_if_statements
  12. {
  13. public partial class Form1 : Form
  14. {
  15. private string x; //This defines the string variable x
  16. private string y;
  17. private string random_string;
  18. private int x_number; //This defines the integer variable x_number
  19. private int y_number;
  20. private int random;
  21. public Form1()
  22. {
  23. InitializeComponent(); //This creates the window from the information that was entered in the form designer
  24. }
  25. private void radioButton1_CheckedChanged(object sender, EventArgs e)
  26. {
  27. x = this.textBox1.Text;
  28. y = this.textBox2.Text;
  29. if (x == "") //This sees if x has no value
  30. {
  31. x = "0"; //This sets x to 0
  32. }
  33. if (y == "") //This sees if x has no value
  34. {
  35. y = "0"; //This sets y to 0
  36. }
  37. x_number = Convert.ToInt32(x); //This converts the string x to a integer then stores it in x_number
  38. y_number = Convert.ToInt32(y);
  39. random = x_number + y_number; //This sets the integer variable random to the value of x_number plus y_number
  40. random_string = Convert.ToString(random); //This converts the integer random to the string random_string
  41. this.label3.Text = random_string;
  42. } //This method is called when the radiobutton (a button that when pressed makes every other radiobutton in its groupbox not pressed) is changed
  43. private void radioButton2_CheckedChanged(object sender, EventArgs e)
  44. {
  45. x = this.textBox1.Text;
  46. y = this.textBox2.Text;
  47. if (x == "")
  48. {
  49. x = "0";
  50. }
  51. if (y == "")
  52. {
  53. y = "0";
  54. }
  55. x_number = Convert.ToInt32(x);
  56. y_number = Convert.ToInt32(y);
  57. random = x_number - y_number;
  58. random_string = Convert.ToString(random);
  59. this.label3.Text = random_string;
  60. }
  61. private void radioButton4_CheckedChanged(object sender, EventArgs e)
  62. {
  63. x = this.textBox1.Text;
  64. y = this.textBox2.Text;
  65. if (x == "")
  66. {
  67. x = " 0";
  68. }
  69. if (y == "")
  70. {
  71. y = "0";
  72. }
  73. x_number = Convert.ToInt32(x);
  74. y_number = Convert.ToInt32(y);
  75. random = x_number * y_number;
  76. random_string = Convert.ToString(random);
  77. this.label3.Text = random_string;
  78. }
  79. private void radioButton3_CheckedChanged(object sender, EventArgs e)
  80. {
  81. x = this.textBox1.Text;
  82. y = this.textBox2.Text;
  83. if (x == "")
  84. {
  85. x = "0";
  86. }
  87. if (y == "")
  88. {
  89. y = "0";
  90. }
  91. x_number = Convert.ToInt32(x);
  92. y_number = Convert.ToInt32(y);
  93. if (y_number == 0) //This is to make sure that we don't divide by 0
  94. {
  95. random_string = "Divide by zero error";
  96. }
  97. else
  98. {
  99. random = x_number / y_number;
  100. random_string = Convert.ToString(random);
  101. }
  102. this.label3.Text = random_string;
  103. }
  104. private void radioButton7_CheckedChanged(object sender, EventArgs e)
  105. {
  106. x = this.textBox1.Text;
  107. y = this.textBox2.Text;
  108. if (x == "")
  109. {
  110. x = "0";
  111. }
  112. if (y == "")
  113. {
  114. y = "0";
  115. }
  116. x_number = Convert.ToInt32(x);
  117. y_number = Convert.ToInt32(y);
  118. if (x_number == y_number) //This checks if the integer x_number is equal to the integer y_number
  119. {
  120. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.yes; //If it is the picture is set to a check
  121. }
  122. else //If they are not then the picture is set as an X
  123. {
  124. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.no;
  125. }
  126. }
  127. private void radioButton8_CheckedChanged(object sender, EventArgs e)
  128. {
  129. x = this.textBox1.Text;
  130. y = this.textBox2.Text;
  131. if (x == "")
  132. {
  133. x = "0";
  134. }
  135. if (y == "")
  136. {
  137. y = "0";
  138. }
  139. x_number = Convert.ToInt32(x);
  140. y_number = Convert.ToInt32(y);
  141. if (x_number > y_number) //Check if the integer x_number is greater than integer y_number
  142. {
  143. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.yes;
  144. }
  145. else
  146. {
  147. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.no;
  148. }
  149. }
  150. private void radioButton6_CheckedChanged(object sender, EventArgs e)
  151. {
  152. x = this.textBox1.Text;
  153. y = this.textBox2.Text;
  154. if (x == "")
  155. {
  156. x = "0";
  157. }
  158. if (y == "")
  159. {
  160. y = "0";
  161. }
  162. x_number = Convert.ToInt32(x);
  163. y_number = Convert.ToInt32(y);
  164. if (x_number < y_number) //Check if the integer x_number is less than integer y_number
  165. {
  166. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.yes;
  167. }
  168. else
  169. {
  170. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.no;
  171. }
  172. }
  173. private void radioButton5_CheckedChanged(object sender, EventArgs e)
  174. {
  175. x = this.textBox1.Text;
  176. y = this.textBox2.Text;
  177. if (x == "")
  178. {
  179. x = "0";
  180. }
  181. if (y == "")
  182. {
  183. y = "0";
  184. }
  185. x_number = Convert.ToInt32(x);
  186. y_number = Convert.ToInt32(y);
  187. if (x_number >= y_number) //Check if the integer x_number is greater than or equal to integer y_number
  188. {
  189. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.yes;
  190. }
  191. else
  192. {
  193. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.no;
  194. }
  195. }
  196. private void radioButton9_CheckedChanged(object sender, EventArgs e)
  197. {
  198. x = this.textBox1.Text;
  199. y = this.textBox2.Text;
  200. if (x == "")
  201. {
  202. x = "0";
  203. }
  204. if (y == "")
  205. {
  206. y = "0";
  207. }
  208. x_number = Convert.ToInt32(x);
  209. y_number = Convert.ToInt32(y);
  210. if (x_number <= y_number) //Check if the integer x_number is less than or equal to integer y_number
  211. {
  212. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.yes;
  213. }
  214. else
  215. {
  216. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.no;
  217. }
  218. }
  219. private void radioButton10_CheckedChanged(object sender, EventArgs e)
  220. {
  221. x = this.textBox1.Text;
  222. y = this.textBox2.Text;
  223. if (x == "")
  224. {
  225. x = "0";
  226. }
  227. if (y == "")
  228. {
  229. y = "0";
  230. }
  231. x_number = Convert.ToInt32(x);
  232. y_number = Convert.ToInt32(y);
  233. if (x_number != y_number) //Check if the integer x_number is not equal to integer y_number
  234. {
  235. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.yes;
  236. }
  237. else
  238. {
  239. this.pictureBox1.Image = global::Example_of_math_variables_and_if_statements.Properties.Resources.no;
  240. }
  241. }
  242. }
  243. }
In the above code I have performed all the math as well as logical operations.