From 3e1d95d470d9101227250748ec59c1fa0cb01269 Mon Sep 17 00:00:00 2001
From: Lukasz M <ttecluk@gmail.com>
Date: Thu, 24 Mar 2022 18:43:36 +0100
Subject: [PATCH] added invcheck feature

---
 linalg-practice.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/linalg-practice.py b/linalg-practice.py
index 49f0a94..032e0b1 100644
--- a/linalg-practice.py
+++ b/linalg-practice.py
@@ -28,6 +28,14 @@ def detcheck(a, b, rowcol, intmax):
     # return bool based on if input equals determinant
     return (det == sp.nsimplify(input("What is the determinant of this matrix?: ")))
 
+# invcheck function to check if the inverse of the matrix is correct
+def invcheck(a, b, rowcol, intmax):
+    det = a.det()
+    if det != 0 :
+        # return bool based on if input equals inverse of matrix
+        print("What is the inverse of this matrix?")
+        return (sp.Matrix(inmat(rowcol)) == a.inv())
+
 # practice function
 def practice(t) :
     count = 0
@@ -40,6 +48,8 @@ def practice(t) :
         f = multcheck
     elif t == "det" :
         f = detcheck
+    elif t == "inv" :
+        f = invcheck
     else :
         exit()