diff --git a/core/src/moolsutra/std_ank.rs b/core/src/moolsutra/std_ank.rs
index a16b1a4..daf07d6 100755
--- a/core/src/moolsutra/std_ank.rs
+++ b/core/src/moolsutra/std_ank.rs
@@ -6,7 +6,7 @@ use super::super::mulya::Mulya;
 /// this function converts a string to a number
 pub fn ank(aadhaar: &mut Aadhaar, from: usize) -> Result<Mulya, Dosa> {
     let args = &aadhaar.rashi[from..aadhaar.rashi_len()];
-    let arg = args.get(0);
+    let arg = args.first();
     if let Some(arg) = arg {
         let mut num = String::new();
         let digit_mapping = ['०', '१', '२', '३', '४', '५', '६', '७', '८', '९'];
diff --git a/core/src/moolsutra/std_kul.rs b/core/src/moolsutra/std_kul.rs
index e592100..b4742fc 100755
--- a/core/src/moolsutra/std_kul.rs
+++ b/core/src/moolsutra/std_kul.rs
@@ -7,7 +7,7 @@ use super::super::mulya::Mulya;
 /// this function returns the length of the given string
 pub fn kul(aadhaar: &mut Aadhaar, from: usize) -> Result<Mulya, Dosa> {
     let args = &aadhaar.rashi[from..aadhaar.rashi_len()];
-    let arg = args.get(0);
+    let arg = args.first();
     if let Some(val) = arg {
         match val {
             Mulya::Vakya(string) => Ok(Mulya::Ank(string.s.len() as f64)),
diff --git a/core/src/moolsutra/std_nirgam.rs b/core/src/moolsutra/std_nirgam.rs
index 27429e6..6f2b46c 100755
--- a/core/src/moolsutra/std_nirgam.rs
+++ b/core/src/moolsutra/std_nirgam.rs
@@ -8,7 +8,7 @@ use super::super::mulya::Mulya;
 /// this function exits the program with the given exit code
 pub fn nirgam(aadhaar: &mut Aadhaar, from: usize) -> Result<Mulya, Dosa> {
     let args = &aadhaar.rashi[from..aadhaar.rashi_len()];
-    let code = match args.get(0) {
+    let code = match args.first() {
         Some(Mulya::Ank(code)) => *code as i32,
         _ => 0,
     };
diff --git a/core/src/moolsutra/std_prakaar.rs b/core/src/moolsutra/std_prakaar.rs
index 1084d90..b3bd99e 100755
--- a/core/src/moolsutra/std_prakaar.rs
+++ b/core/src/moolsutra/std_prakaar.rs
@@ -7,7 +7,7 @@ use super::super::mulya::Mulya;
 pub fn prakaar(aadhaar: &mut Aadhaar, from: usize) -> Result<Mulya, Dosa> {
     let args = &aadhaar.rashi[from..aadhaar.rashi_len()];
 
-    if let Some(arg) = args.get(0) {
+    if let Some(arg) = args.first() {
         match arg {
             Mulya::Vakya(_v) => Ok(Mulya::Vakya(aadhaar.gc.intern("वाक्य".to_owned()))),
             Mulya::Ank(_v) => Ok(Mulya::Vakya(aadhaar.gc.intern("अंक".to_owned()))),
diff --git a/core/src/moolsutra/std_shabd.rs b/core/src/moolsutra/std_shabd.rs
index 7a38b8b..9735249 100755
--- a/core/src/moolsutra/std_shabd.rs
+++ b/core/src/moolsutra/std_shabd.rs
@@ -6,7 +6,7 @@ use super::super::mulya::Mulya;
 /// this function returns the given string
 pub fn shabd(aadhaar: &mut Aadhaar, from: usize) -> Result<Mulya, Dosa> {
     let args = &aadhaar.rashi[from..aadhaar.rashi_len()];
-    let arg = args.get(0);
+    let arg = args.first();
     if let Some(arg) = arg {
         Ok(Mulya::Vakya(aadhaar.gc.intern(arg.to_string())))
     } else {
diff --git a/core/src/moolsutra/std_truti.rs b/core/src/moolsutra/std_truti.rs
index 3e23826..8b79f59 100755
--- a/core/src/moolsutra/std_truti.rs
+++ b/core/src/moolsutra/std_truti.rs
@@ -6,7 +6,7 @@ use super::super::mulya::Mulya;
 /// this function throws an dosa with the given string
 pub fn truti(aadhaar: &mut Aadhaar, from: usize) -> Result<Mulya, Dosa> {
     let args = &aadhaar.rashi[from..aadhaar.rashi_len()];
-    if let Some(arg) = args.get(0) {
+    if let Some(arg) = args.first() {
         let dosa = format!("त्रुटि : {arg}");
         Err(aadhaar.throw_dosa(&dosa))
     } else {