diff --git a/docs/1.5-Built-in-functions.md b/docs/1.5-Built-in-functions.md
index a1c4f0f..6bfef3f 100644
--- a/docs/1.5-Built-in-functions.md
+++ b/docs/1.5-Built-in-functions.md
@@ -216,7 +216,7 @@ If less than 4 assets are found, the firsts values will have the assetId and the
 * Description:
 Returns the quantity (QNT) of 'assetId' transfered in 'transaction'.
 If transaction is invalid, -1 is returned.
-If transaction valid and there is asset transfers that match 'assetId', zero is returned.
+If transaction valid and there is no asset transfers that match 'assetId', zero is returned.
 </details>
 <details>
 <summary>
diff --git a/docs/3-Learning-with-examples.md b/docs/3-Learning-with-examples.md
index 2648b5d..fd74a97 100644
--- a/docs/3-Learning-with-examples.md
+++ b/docs/3-Learning-with-examples.md
@@ -63,7 +63,7 @@ long counter;
 
 void main(void) {
     long txid;
-    while ((txid = getNextTx() != 0) {
+    while ((txid = getNextTx()) != 0) {
         // Process transaction in a specific function
         processTX();
     }
@@ -94,7 +94,7 @@ void processTX(void){
 
 while (true) {
     long txid;
-    while ((txid = getNextTx() != 0) {
+    while ((txid = getNextTx()) != 0) {
         sendAmount(getAmount(txid), getSender(txid))
     }
     // After all transactions processed